Gut gyp_chromium, common.gypi.

build/common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
-  # Variables expected to be overriden on the GYP command line (-D) or by
-  # ~/.gyp/include.gypi.
-  'variables': {
-    # Putting a variables dict inside another variables dict looks kind of
-    # weird.  This is done so that 'host_arch', 'chromeos', etc are defined as
-    # variables within the outer variables dict here.  This is necessary
-    # to get these variables defined for the conditions within this variables
-    # dict that operate on these variables.
-    'variables': {
-      'variables': {
-        'variables': {
-          'variables': {
-            # Whether we're building a ChromeOS build.
-            'chromeos%': 0,
-
-            # Whether we're building the cast (chromecast) shell
-            'chromecast%': 0,
-
-            # Whether or not we are using the Aura windowing framework.
-            'use_aura%': 0,
-
-            # Whether or not we are building the Ash shell.
-            'use_ash%': 0,
-
-            # Whether or not we are using CRAS, the ChromeOS Audio Server.
-            'use_cras%': 0,
-
-            # Use a raw surface abstraction.
-            'use_ozone%': 0,
-
-            # Configure the build for small devices. See crbug.com/318413
-            'embedded%': 0,
-
-            'conditions': [
-              # Compute the architecture that we're building on.
-              ['OS=="win" or OS=="ios"', {
-                'host_arch%': 'ia32',
-              }, {
-                'host_arch%': '<!pymod_do_main(detect_host_arch)',
-              }],
-            ],
-          },
-          # Copy conditionally-set variables out one scope.
-          'chromeos%': '<(chromeos)',
-          'chromecast%': '<(chromecast)',
-          'use_aura%': '<(use_aura)',
-          'use_ash%': '<(use_ash)',
-          'use_cras%': '<(use_cras)',
-          'use_ozone%': '<(use_ozone)',
-          'embedded%': '<(embedded)',
-          'host_arch%': '<(host_arch)',
-
-          # Whether we are using Views Toolkit
-          'toolkit_views%': 0,
-
-          # Use the PCI lib to collect GPU information.
-          'use_libpci%': 1,
-
-          # Use OpenSSL for representing certificates. When targeting Android,
-          # the platform certificate library is used for certificate
-          # verification. On other targets, this flag also enables OpenSSL for
-          # certificate verification, but this configuration is unsupported.
-          'use_openssl_certs%': 0,
-
-          # Whether or not we use external popup menu.
-          'use_external_popup_menu%': 0,
-
-          # Disable viewport meta tag by default.
-          'enable_viewport%': 0,
-
-          # Enable HiDPI support.
-          'enable_hidpi%': 0,
-
-          # Enable Wayland display server support.
-          'enable_wayland_server%' : 0,
-
-          # Enable Wi-Fi Display support.
-          # WARNING: This enables MPEG Transport Stream (MPEG-TS) encoding!
-          'enable_wifi_display%' : 0,
-
-          # By default we build against a stable sysroot image to avoid
-          # depending on the packages installed on the local machine. Set this
-          # to 0 to build against locally installed headers and libraries (e.g.
-          # if packaging for a linux distro)
-          'use_sysroot%': 1,
-
-          # Override buildtype to select the desired build flavor.
-          # Dev - everyday build for development/testing
-          # Official - release build (generally implies additional processing)
-          # TODO(mmoss) Once 'buildtype' is fully supported (e.g. Windows gyp
-          # conversion is done), some of the things which are now controlled by
-          # 'branding', such as symbol generation, will need to be refactored
-          # based on 'buildtype' (i.e. we don't care about saving symbols for
-          # non-Official # builds).
-          'buildtype%': 'Dev',
-
-          # Override branding to select the desired branding flavor.
-          'branding%': 'Chromium',
-
-          'conditions': [
-            # Windows and Linux use Aura, but not Ash.
-            ['OS=="win" or OS=="linux" or OS=="openbsd" or OS=="freebsd"', {
-              'use_aura%': 1,
-            }],
-
-            # ChromeOS uses Ash.
-            ['chromeos', {
-              'use_ash%': 1,
-            }],
-
-            ['chromecast==1', {
-              'use_libpci': 0,
-              'conditions': [
-                ['OS!="android"', {
-                  'embedded%': 1,
-                  'use_ozone%': 1,
-                }],
-              ],
-            }],
-
-            # Ozone uses Aura.
-            ['use_ozone==1', {
-              'use_aura%': 1,
-            }],
-
-            # Whether we're a traditional desktop unix.
-            ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and chromeos==0', {
-              'desktop_linux%': 1,
-            }, {
-              'desktop_linux%': 0,
-            }],
-
-            # Embedded implies ozone.
-            ['embedded==1', {
-              'use_ozone%': 1,
-            }],
-
-            # Mac and Android use external popup menu.
-            ['OS=="mac" or OS=="android"', {
-              'use_external_popup_menu%': 1,
-            }],
-
-            ['OS=="android"', {
-              'target_arch%': 'arm',
-            }, {
-              # Default architecture we're building for is the architecture we're
-              # building on, and possibly sub-architecture (for iOS builds).
-              'target_arch%': '<(host_arch)',
-            }],
-          ],
-        },
-        # Copy conditionally-set variables out one scope.
-        'chromeos%': '<(chromeos)',
-        'chromecast%': '<(chromecast)',
-        'desktop_linux%': '<(desktop_linux)',
-        'use_aura%': '<(use_aura)',
-        'use_ash%': '<(use_ash)',
-        'use_cras%': '<(use_cras)',
-        'use_ozone%': '<(use_ozone)',
-        'embedded%': '<(embedded)',
-        'use_libpci%': '<(use_libpci)',
-        'use_openssl_certs%': '<(use_openssl_certs)',
-        'use_external_popup_menu%': '<(use_external_popup_menu)',
-        'enable_viewport%': '<(enable_viewport)',
-        'enable_hidpi%': '<(enable_hidpi)',
-        'enable_wayland_server%': '<(enable_wayland_server)',
-        'enable_wifi_display%': '<(enable_wifi_display)',
-        'buildtype%': '<(buildtype)',
-        'branding%': '<(branding)',
-        'branding_path_component%': '<(branding)',
-        'host_arch%': '<(host_arch)',
-        'target_arch%': '<(target_arch)',
-        'use_sysroot%': '<(use_sysroot)',
-
-        # Set to true to instrument the code with function call logger.
-        # See src/third_party/cygprofile/cyg-profile.cc for details.
-        'order_profiling%': 0,
-
-        'target_subarch%': '',
-
-        # The channel to build on Android: stable, beta, dev, canary, or
-        # default. "default" should be used on non-official builds.
-        'android_channel%': 'default',
-
-        # Set ARM architecture version.
-        'arm_version%': 7,
-
-        # Use aurax11 for clipboard implementation. This is true on linux_aura.
-        'use_clipboard_aurax11%': 0,
-
-        # goma settings.
-        # 1 to use goma.
-        # If no gomadir is set, it uses the default gomadir.
-        'use_goma%': 0,
-        'gomadir%': '',
-
-        'chroot_cmd%': '',
-
-        # The system libdir used for this ABI.
-        'system_libdir%': 'lib',
-
-        # Default MIPS arch variant. This is set in the conditions block
-        # below for MIPS targets.
-        'mips_arch_variant%': '',
-
-        # MIPS DSP ASE revision. Possible values are:
-        #   0: unavailable
-        #   1: revision 1
-        #   2: revision 2
-        'mips_dsp_rev%': 0,
-
-        # MIPS SIMD Arch compilation flag.
-        'mips_msa%': 1,
-
-        'conditions': [
-          ['branding == "Chrome"', {
-            'branding_path_component%': 'google_chrome',
-          }],
-
-          ['branding == "Chromium"', {
-            'branding_path_component%': 'chromium',
-          }],
-
-          # Ash needs Aura.
-          ['use_aura==0', {
-            'use_ash%': 0,
-          }],
-
-          # Set default value of toolkit_views based on OS.
-          ['OS=="mac" or OS=="win" or chromeos==1 or use_aura==1', {
-            'toolkit_views%': 1,
-          }, {
-            'toolkit_views%': 0,
-          }],
-
-          # Embedded builds use aura without ash or views.
-          ['embedded==1', {
-            'use_aura%': 1,
-            'use_ash%': 0,
-            'toolkit_views%': 0,
-          }],
-
-          # Chromecast builds on x86 Linux should default to desktop builds.
-          ['chromecast==1 and OS=="linux" and (target_arch=="ia32" or target_arch=="x64")', {
-            'is_cast_desktop_build%': 1,
-          }, {
-            'is_cast_desktop_build%': 0,
-          }],
-
-          # Enable HiDPI on Mac OS, Windows and Linux (including Chrome OS).
-          ['OS=="mac" or OS=="win" or OS=="linux" or OS=="openbsd" or OS=="freebsd"', {
-            'enable_hidpi%': 1,
-          }],
-
-          # Enable App Launcher on ChromeOS only.
-          ['chromeos==1', {
-            'enable_app_list%': 1,
-          }, {
-            'enable_app_list%': 0,
-          }],
-
-          ['use_aura==1 and OS!="android"', {
-            'use_default_render_theme%': 1,
-          }, {
-            'use_default_render_theme%': 0,
-          }],
-
-          ['use_ozone==1', {
-            'use_ozone_evdev%': 1,
-          }, {
-            'use_ozone_evdev%': 0,
-          }],
-
-          # Set default gomadir.
-          ['OS=="win"', {
-            'gomadir': 'c:\\goma\\goma-win64',
-          }, {
-            'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
-          }],
-
-          # Set the default "target_subarch" on iOS. Valid values are "arm32",
-          # "arm64" and "both" (meaning a fat binary).
-          ['OS=="ios"', {
-            'target_subarch%': 'arm64',
-          }],
-
-          # Set arch variants for MIPS platforms.
-          ['target_arch=="mips64el"', {
-            'conditions': [
-              ['OS=="android"', {
-                'mips_arch_variant%': 'r6',
-              }, {
-                'mips_arch_variant%': 'r2',
-              }],
-            ],
-          }],
-
-          ['target_arch=="mipsel"', {
-            'mips_arch_variant%': 'r1',
-          }],
-
-          # The system root for linux builds.
-          ['OS=="linux" and chromeos==0 and use_sysroot==1', {
-            # sysroot needs to be an absolute path otherwise it generates
-            # incorrect results when passed to pkg-config
-            'conditions': [
-              ['target_arch=="arm"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_arm-sysroot',
-              }],
-              ['target_arch=="arm64"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_jessie_arm64-sysroot',
-              }],
-              ['target_arch=="x64"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_amd64-sysroot',
-              }],
-              ['target_arch=="ia32"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_i386-sysroot',
-              }],
-              ['target_arch=="mipsel"', {
-                'sysroot%': '<!(cd <(DEPTH) && pwd -P)/build/linux/debian_wheezy_mips-sysroot',
-              }],
-            ],
-          }, {
-            'sysroot%': ''
-          }], # OS=="linux" and use_sysroot==1
-        ],
-      },
-
-      # Copy conditionally-set variables out one scope.
-      'chromeos%': '<(chromeos)',
-      'chromecast%': '<(chromecast)',
-      'is_cast_desktop_build%': '<(is_cast_desktop_build)',
-      'host_arch%': '<(host_arch)',
-      'target_arch%': '<(target_arch)',
-      'target_subarch%': '<(target_subarch)',
-      'mips_arch_variant%': '<(mips_arch_variant)',
-      'mips_dsp_rev%': '<(mips_dsp_rev)',
-      'mips_msa%': '<(mips_msa)',
-      'toolkit_views%': '<(toolkit_views)',
-      'desktop_linux%': '<(desktop_linux)',
-      'use_aura%': '<(use_aura)',
-      'use_ash%': '<(use_ash)',
-      'use_cras%': '<(use_cras)',
-      'use_libpci%': '<(use_libpci)',
-      'use_ozone%': '<(use_ozone)',
-      'use_ozone_evdev%': '<(use_ozone_evdev)',
-      'use_clipboard_aurax11%': '<(use_clipboard_aurax11)',
-      'embedded%': '<(embedded)',
-      'use_openssl_certs%': '<(use_openssl_certs)',
-      'use_external_popup_menu%': '<(use_external_popup_menu)',
-      'enable_viewport%': '<(enable_viewport)',
-      'enable_hidpi%': '<(enable_hidpi)',
-      'enable_wayland_server%': '<(enable_wayland_server)',
-      'enable_wifi_display%': '<(enable_wifi_display)',
-      'android_channel%': '<(android_channel)',
-      'use_goma%': '<(use_goma)',
-      'gomadir%': '<(gomadir)',
-      'enable_app_list%': '<(enable_app_list)',
-      'use_default_render_theme%': '<(use_default_render_theme)',
-      'buildtype%': '<(buildtype)',
-      'branding%': '<(branding)',
-      'branding_path_component%': '<(branding_path_component)',
-      'arm_version%': '<(arm_version)',
-      'sysroot%': '<(sysroot)',
-      'use_sysroot%': '<(use_sysroot)',
-      'chroot_cmd%': '<(chroot_cmd)',
-      'system_libdir%': '<(system_libdir)',
-      'order_profiling%': '<(order_profiling)',
-
-      # TODO(zforman): Remove as soon as no bots depend on this.
-      'dont_embed_build_metadata%': 0,
-
-      # Set to 1 to force Visual C++ to use legacy debug information format /Z7.
-      # This is useful for parallel compilation tools which can't support /Zi.
-      # Only used on Windows.
-      'win_z7%' : 0,
-
-      # Set to 1 to enable dcheck in Release build.
-      'dcheck_always_on%': 0,
-
-      # Set to 1 to make a build that disables unshipped tracing events.
-      # Note: this setting is ignored if buildtype=="Official".
-      'tracing_like_official_build%': 0,
-
-      # Set to 1 to make a build that disables activation of field trial tests
-      # specified in testing/variations/fieldtrial_testing_config_*.json.
-      # Note: this setting is ignored if branding=="Chrome".
-      'fieldtrial_testing_like_official_build%': 0,
-
-      # Disable image loader component extension by default.
-      'image_loader_extension%': 0,
-
-      # Set NEON compilation flags.
-      'arm_neon%': 1,
-
-      # Detect NEON support at run-time. TODO(pasko): This variable is no longer
-      # set to non-zero, remove it when the last official build with NEON
-      # runtime detection propagates to Stable channel.
-      'arm_neon_optional%': 0,
-
-      # Use libjpeg-turbo as the JPEG codec used by Chromium.
-      'use_libjpeg_turbo%': 1,
-
-      # Use system libjpeg. Note that the system's libjepg will be used even if
-      # use_libjpeg_turbo is set.
-      'use_system_libjpeg%': 0,
-
-      # By default, component is set to static_library and it can be overriden
-      # by the GYP command line or by ~/.gyp/include.gypi.
-      'component%': 'static_library',
-
-      # /analyze is off by default on Windows because it is very slow and noisy.
-      # Enable with GYP_DEFINES=win_analyze=1
-      'win_analyze%': 0,
-
-      # /debug:fastlink is off by default on Windows because it generates PDBs
-      # that are machine-local. But, great for local builds.
-      # Enable with GYP_DEFINES=win_fastlink=1
-      'win_fastlink%': 0,
-
-      # Experimental setting to optimize Chrome's DLLs with PGO.
-      'chrome_pgo_phase%': '0',
-
-      # Experimental setting to build the official builds with full WPO.
-      'full_wpo_on_official%': '0',
-
-      # Set to select the Title Case versions of strings in GRD files.
-      'use_titlecase_in_grd%': 0,
-
-      # Remoting compilation is enabled by default. Set to 0 to disable.
-      'remoting%': 1,
-
-      # Configuration policy is enabled by default. Overridden on some
-      # platforms. This can't be disabled manually since code in src/chrome
-      # assumes this is enabled.
-      'configuration_policy': 1,
-
-      # Variable safe_browsing is used to control the build time configuration
-      # for safe browsing feature. Safe browsing can be compiled in 3 different
-      # levels: 0 disables it, 1 enables it fully, and 2 enables mobile
-      # protection via an external API.
-      'safe_browsing%': 1,
-
-      # Web speech is enabled by default. Set to 0 to disable.
-      'enable_web_speech%': 1,
-
-      # 'Ok Google' hotwording is disabled by default. Set to 1 to enable. (This
-      # will download a closed-source NaCl module at startup.) Chrome-branded
-      # ChromeOS builds have this enabled by default.
-      'enable_hotwording%': 0,
-
-      # Notifications are compiled in by default. Set to 0 to disable.
-      'notifications%' : 1,
-
-      # Use dsymutil to generate real .dSYM files on Mac. The default is 0 for
-      # regular builds and 1 for ASan builds.
-      'mac_want_real_dsym%': 'default',
-
-      # If this is set, the clang plugins used on the buildbot will be used.
-      # Run tools/clang/scripts/update.py to make sure they are compiled.
-      # This causes 'clang_chrome_plugins_flags' to be set.
-      # Has no effect if 'clang' is not set as well.
-      'clang_use_chrome_plugins%': 1,
-
-      # Enable building with ASAN (Clang's -fsanitize=address option).
-      # -fsanitize=address only works with clang, but asan=1 implies clang=1
-      # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
-      'asan%': 0,
-      'asan_blacklist%': '<(PRODUCT_DIR)/../../tools/memory/asan/blacklist.txt',
-      # Enable coverage gathering instrumentation in sanitizer tools. This flag
-      # also controls coverage granularity.
-      'sanitizer_coverage%': '',
-      # Enable intra-object-overflow detection in ASan (experimental).
-      'asan_field_padding%': 0,
-
-      # Enable Chromium overrides of the default configurations for various
-      # dynamic tools (like ASan).
-      'use_sanitizer_options%': 0,
-
-      # Enable building with SyzyAsan.
-      # See https://github.com/google/syzygy/wiki/SyzyASanHowTo
-      'syzyasan%': 0,
-
-      # Enable building with LSan (Clang's -fsanitize=leak option).
-      # -fsanitize=leak only works with clang, but lsan=1 implies clang=1
-      # See https://sites.google.com/a/chromium.org/dev/developers/testing/leaksanitizer
-      'lsan%': 0,
-
-      # Enable building with TSan (Clang's -fsanitize=thread option).
-      # -fsanitize=thread only works with clang, but tsan=1 implies clang=1
-      # See http://clang.llvm.org/docs/ThreadSanitizer.html
-      'tsan%': 0,
-      'tsan_blacklist%': '<(PRODUCT_DIR)/../../tools/memory/tsan_v2/ignores.txt',
-
-      # Enable building with MSan (Clang's -fsanitize=memory option).
-      # MemorySanitizer only works with clang, but msan=1 implies clang=1
-      # See http://clang.llvm.org/docs/MemorySanitizer.html
-      'msan%': 0,
-      'msan_blacklist%': '<(PRODUCT_DIR)/../../tools/msan/blacklist.txt',
-      # Track where uninitialized memory originates from. From fastest to
-      # slowest: 0 - no tracking, 1 - track only the initial allocation site, 2
-      # - track the chain of stores leading from allocation site to use site.
-      'msan_track_origins%': 2,
-
-      # Enable building with UBSan (Clang's -fsanitize=undefined option).
-      # -fsanitize=undefined only works with clang, but ubsan=1 implies clang=1
-      # See http://clang.llvm.org/docs/UsersManual.html
-      'ubsan%': 0,
-      'ubsan_blacklist%': '<(PRODUCT_DIR)/../../tools/ubsan/blacklist.txt',
-      'ubsan_security_blacklist%': '<(PRODUCT_DIR)/../../tools/ubsan/security_blacklist.txt',
-      'ubsan_vptr_blacklist%': '<(PRODUCT_DIR)/../../tools/ubsan/vptr_blacklist.txt',
-
-      # Enable building with UBsan's vptr (Clang's -fsanitize=vptr option).
-      # -fsanitize=vptr only works with clang, but ubsan_vptr=1 implies clang=1
-      # ubsan_security also enables UBSan's vptr.
-      'ubsan_security%': 0,
-      'ubsan_vptr%': 0,
-
-      # Use dynamic libraries instrumented by one of the sanitizers
-      # instead of the standard system libraries. Set this flag to build the
-      # libraries from source.
-      'use_instrumented_libraries%': 0,
-
-      # Use dynamic libraries instrumented by one of the sanitizers
-      # instead of the standard system libraries. Set this flag to download
-      # prebuilt binaries from GCS.
-      'use_prebuilt_instrumented_libraries%': 0,
-
-      # Use libc++ (third_party/libc++ and third_party/libc++abi) instead of
-      # stdlibc++ as standard library. This is intended to use for instrumented
-      # builds.
-      'use_custom_libcxx%': 0,
-
-      # Use the provided profiled order file to link Chrome image with it.
-      # This makes Chrome faster by better using CPU cache when executing code.
-      # This is known as PGO (profile guided optimization).
-      # See https://sites.google.com/a/google.com/chrome-msk/dev/boot-speed-up-effort
-      'order_text_section%' : "",
-
-      # Set to 1 compile with -fPIC cflag on linux. This is a must for shared
-      # libraries on linux x86-64 and arm, plus ASLR.
-      'linux_fpic%': 1,
-
-      # Whether one-click signin is enabled or not.
-      'enable_one_click_signin%': 0,
-
-      # Enable Chrome browser extensions
-      'enable_extensions%': 1,
-
-      # Enable basic printing support and UI.
-      'enable_basic_printing%': 1,
-
-      # Enable printing with print preview. It does not imply
-      # enable_basic_printing. It's possible to build Chrome with preview only.
-      'enable_print_preview%': 1,
-
-      # For CLD2, the size of the tables that should be included in the build
-      # See third_party/cld_2/cld_2.gyp for more information.
-      #   0: Small tables, high accuracy
-      #   2: Large tables, higher accuracy
-      'cld2_table_size%': 2,
-
-      # Enable spell checker.
-      'enable_spellcheck%': 1,
-
-      # Use the operating system spellchecker, e.g. NSSpellChecker on Mac or
-      # SpellCheckerSession on Android.
-      'use_browser_spellchecker%': 0,
-
-      # Use Minikin hyphenation engine.
-      'use_minikin_hyphenation%': 0,
-
-      # Webrtc compilation is enabled by default. Set to 0 to disable.
-      'enable_webrtc%': 1,
-
-      # Media router support is enabled by default. Set to 0 to disable.
-      'enable_media_router%': 1,
-
-      # Enables use of the session service, which is enabled by default.
-      # Support for disabling depends on the platform.
-      'enable_session_service%': 1,
-
-      # Enables theme support, which is enabled by default.  Support for
-      # disabling depends on the platform.
-      'enable_themes%': 1,
-
-      # Enable the task manager by default.
-      'enable_task_manager%': 1,
-
-      # Enables used resource whitelist generation; disabled by default.
-      'enable_resource_whitelist_generation%': 0,
-
-      # Enable FILE support by default.
-      'disable_file_support%': 0,
-
-      # Enable FTP support by default.
-      'disable_ftp_support%': 0,
-
-      # Do not use the platform ICU alternatives by default.
-      'use_platform_icu_alternatives%': 0,
-
-      # Do not disable brotli filter by default.
-      'disable_brotli_filter%': 0,
-
-      # Use of precompiled headers on Windows.
-      #
-      # This variable may be explicitly set to 1 (enabled) or 0
-      # (disabled) in ~/.gyp/include.gypi or via the GYP command line.
-      # This setting will override the default.
-      #
-      # See
-      # https://chromium.googlesource.com/chromium/src/+/master/docs/windows_precompiled_headers.md
-      # for details.
-      'chromium_win_pch%': 0,
-
-      # Clang stuff.
-      'make_clang_dir%': 'third_party/llvm-build/Release+Asserts',
-      # Set this to true when building with Clang.
-      # See https://chromium.googlesource.com/chromium/src/+/master/docs/clang.md for details.
-      # If this is set, clang is used as both host and target compiler in
-      # cross-compile builds.
-      'clang%': 0,
-
-      # Use experimental lld linker instead of the platform's default linker.
-      'use_lld%': 0,
-
-      # Enable plugin installation by default.
-      'enable_plugin_installation%': 1,
-
-      # Specifies whether to use canvas_skia.cc in place of platform
-      # specific implementations of gfx::Canvas. Affects text drawing in the
-      # Chrome UI.
-      # TODO(asvitkine): Enable this on all platforms and delete this flag.
-      #                  http://crbug.com/105550
-      'use_canvas_skia%': 0,
-
-      # Set to "drmemory" to configure the build to work with DrMemory.
-      'build_for_tool%': '',
-
-      'wix_path%': '<(DEPTH)/third_party/wix',
-
-      # Supervised users are enabled by default.
-      'enable_supervised_users%': 1,
-
-      'enable_mdns%' : 0,
-      'enable_service_discovery%': 0,
-      'enable_hangout_services_extension%': 0,
-
-       # Enable the Syzygy optimization step.
-      'syzygy_optimize%': 0,
-
-      # Automatically select platforms under ozone. Turn this off to
-      # build only explicitly selected platforms.
-      'ozone_auto_platforms%': 1,
-
-      # Disable the display for a chromecast build. Set to 1 perform an audio-
-      # only build.
-      'disable_display%': 0,
-
-      # If this is set clang is used as host compiler, but not as target
-      # compiler. Always do this by default.
-      'host_clang%': 1,
-
-      # Variables to control Link-Time Optimization (LTO).
-      # On Android, when using GCC LTO, the variable use_lto enables LTO on code
-      # compiled with -Os, and use_lto_o2 enables LTO on code compiled with -O2.
-      # On other platforms (including Android with Clang), use_lto enables LTO
-      # in all translation units, and use_lto_o2 has no effect.
-      #
-      # On Linux and Android, when using LLVM LTO, the script
-      # build/download_gold_plugin.py must be run to download a linker plugin.
-      # On Mac, LLVM needs to be built from scratch using
-      # tools/clang/scripts/update.py and the absolute path to
-      # third_party/llvm-build/Release+Asserts/lib must be added to
-      # $DYLD_LIBRARY_PATH to pick up the right version of the linker plugin.
-      # TODO(pcc): Teach build system to use -lto_library flag to specify path
-      # to linker plugin on Mac.
-      #
-      # On Android/GCC, the variables must *not* be enabled at the same time.
-      # In this case LTO would 'merge' the optimization flags at link-time
-      # which would lead to all code be optimized with -O2. See crbug.com/407544
-      'use_lto%': 0,
-      'use_lto_o2%': 0,
-
-      # Allowed level of identical code folding in the gold linker.
-      'gold_icf_level%': 'all',
-
-      # Libxkbcommon usage.
-      'use_xkbcommon%': 0,
-
-      # Whether we use GTKv3 on linux.
-      'use_gtk3%': 0,
-
-      # Control Flow Integrity for virtual calls and casts.
-      # See http://clang.llvm.org/docs/ControlFlowIntegrity.html
-      'cfi_vptr%': 0,
-      # TODO(krasin): remove it. See https://crbug.com/626794.
-      'cfi_cast%': 0,
-      'cfi_diag%': 0,
-
-      'cfi_blacklist%': '<(PRODUCT_DIR)/../../tools/cfi/blacklist.txt',
-
-      # Whether the entire browser uses toolkit-views on Mac instead of Cocoa.
-      'mac_views_browser%': 0,
-
-      # By default, use ICU data file (icudtl.dat).
-      'icu_use_data_file_flag%': 1,
-
-      # Turn on JNI generation optimizations by default.
-      'optimize_jni_generation%': 1,
-
-      'conditions': [
-        # A flag for POSIX platforms
-        ['OS=="win"', {
-          'os_posix%': 0,
-        }, {
-          'os_posix%': 1,
-        }],
-
-        # A flag for BSD platforms
-        ['OS=="freebsd" or OS=="openbsd"', {
-          'os_bsd%': 1,
-        }, {
-          'os_bsd%': 0,
-        }],
-
-        # NSS usage.
-        ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris")', {
-          'use_nss_certs%': 1,
-        }, {
-          'use_nss_certs%': 0,
-        }],
-
-        # libudev usage.  This currently only affects the content layer.
-        ['OS=="linux" and embedded==0', {
-          'use_udev%': 1,
-        }, {
-          'use_udev%': 0,
-        }],
-
-        # Flags to use X11 on non-Mac POSIX platforms.
-        ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or use_ozone==1', {
-          'use_x11%': 0,
-        }, {
-          'use_x11%': 1,
-        }],
-
-        # Flags to use glib.
-        ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or use_ozone==1', {
-          'use_glib%': 0,
-        }, {
-          'use_glib%': 1,
-        }],
-
-        # Flags to use Wayland server support.
-        ['chromeos==1', {
-          'enable_wayland_server%': 1,
-        }, {
-          'enable_wayland_server%': 0,
-        }],
-
-        # Flags to use pango and cairo.
-        ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or embedded==1', {
-          'use_pango%': 0,
-          'use_cairo%': 0,
-        }, {
-          'use_pango%': 1,
-          'use_cairo%': 1,
-        }],
-
-        # DBus usage.
-        ['(OS=="linux" or OS=="openbsd" or OS=="freebsd") and embedded==0', {
-          'use_dbus%': 1,
-        }, {
-          'use_dbus%': 0,
-        }],
-
-        # We always use skia text rendering in Aura on Windows, since GDI
-        # doesn't agree with our BackingStore.
-        # TODO(beng): remove once skia text rendering is on by default.
-        ['use_aura==1 and OS=="win"', {
-          'enable_skia_text%': 1,
-        }],
-
-        # A flag to enable or disable our compile-time dependency
-        # on gnome-keyring. If that dependency is disabled, no gnome-keyring
-        # support will be available. This option is useful
-        # for Linux distributions and for Aura.
-        ['OS!="linux" or chromeos==1', {
-          'use_gnome_keyring%': 0,
-        }, {
-          'use_gnome_keyring%': 1,
-        }],
-
-        ['OS=="mac" or OS=="ios"', {
-          # Mac and iOS want Title Case strings
-          'use_titlecase_in_grd%': 1,
-        }],
-
-        # Enable loader extensions on Chrome OS.
-        ['chromeos==1', {
-          'image_loader_extension%': 1,
-        }, {
-          'image_loader_extension%': 0,
-        }],
-
-        ['OS=="win" or OS=="mac" or (OS=="linux" and chromeos==0)', {
-          'enable_one_click_signin%': 1,
-        }],
-
-        ['OS=="android"', {
-          'enable_extensions%': 0,
-          'cld2_table_size%': 0,
-          'enable_themes%': 0,
-          'remoting%': 0,
-          'enable_basic_printing%': 1,
-          'enable_print_preview%': 0,
-          'enable_task_manager%':0,
-        }],
-
-        # Android and OSX have built-in spellcheckers that can be utilized.
-        ['OS=="android" or OS=="mac"', {
-          'use_browser_spellchecker%': 1,
-        }],
-
-        # Android has hyphenation dictionaries for Minikin to use.
-        ['OS=="android"', {
-          'use_minikin_hyphenation%': 1,
-        }],
-
-        # Enables proprietary codecs and demuxers; e.g. H264, AAC, MP3, and MP4.
-        # We always build Google Chrome and Chromecast with proprietary codecs.
-        ['branding=="Chrome" or chromecast==1', {
-          'proprietary_codecs%': 1,
-        }, {
-          'proprietary_codecs%': 0,
-        }],
-
-        # Enable Link Time Optimization for the official Linux Chrome.
-        # This requires LLVM Gold plugin to be downloaded.
-        # See src/tools/clang/scripts/update.py
-        ['OS=="linux" and target_arch=="x64" and buildtype=="Official" and branding=="Chrome" and chromeos==0', {
-           'use_lto%': 1,
-        }],
-
-        # Enable hotwording on Chrome-branded ChromeOS builds.
-        ['branding=="Chrome" and chromeos==1', {
-          'enable_hotwording%': 1,
-        }],
-
-        ['OS=="android"', {
-          'enable_webrtc%': 1,
-        }],
-
-        ['OS=="ios"', {
-          'configuration_policy': 0,
-          'disable_ftp_support%': 1,
-          'enable_extensions%': 0,
-          'cld2_table_size%': 0,
-          'enable_basic_printing%': 0,
-          'enable_print_preview%': 0,
-          'enable_session_service%': 0,
-          'enable_spellcheck%': 0,
-          'enable_themes%': 0,
-          'enable_webrtc%': 0,
-          'notifications%': 0,
-          'remoting%': 0,
-          'safe_browsing%': 2,
-          'enable_supervised_users%': 0,
-          'enable_task_manager%': 0,
-          'enable_media_router%': 0,
-        }],
-
-        # Use GPU accelerated cross process image transport by default
-        # on linux and *BSD builds with the Aura window manager
-        ['use_aura==1 and (OS=="linux" or OS=="openbsd" or OS=="freebsd")', {
-          'ui_compositor_image_transport%': 1,
-        }, {
-          'ui_compositor_image_transport%': 0,
-        }],
-
-        # Turn precompiled headers on by default.
-        ['OS=="win" and buildtype!="Official"', {
-          'chromium_win_pch%': 1
-        }],
-
-        # Whether PDF plugin is enabled, and which options it supports.
-        ['OS=="android" or OS=="ios" or (embedded==1 and chromecast==0)', {
-          'enable_pdf%': 0,
-          'pdf_enable_v8%': 0,
-        }, {
-          'enable_pdf%': 1,
-          'pdf_enable_v8%': 1,
-        }],
-        ['OS=="android" or OS=="ios" or (embedded==1 and chromecast==0)', {
-          'pdf_enable_xfa%': 0,
-        }, {
-          'pdf_enable_xfa%': 0,
-        }],
-
-        ['chromeos==1 or OS=="android" or OS=="ios" or desktop_linux==1', {
-          'enable_plugin_installation%': 0,
-        }, {
-          'enable_plugin_installation%': 1,
-        }],
-
-        # Whether PPAPI is enabled.
-        ['OS=="android" or OS=="ios" or (embedded==1 and chromecast==0)', {
-          'enable_plugins%': 0,
-        }, {
-          'enable_plugins%': 1,
-        }],
-
-        # linux_use_bundled_gold: whether to use the gold linker binary checked
-        # into third_party/binutils.  Force this off via GYP_DEFINES when you
-        # are using a custom toolchain and need to control -B in ldflags.
-        # Do not use 32-bit gold on 32-bit hosts as it runs out address space
-        # for component=static_library builds.
-        ['((OS=="linux" or OS=="android") and (target_arch=="x64" or target_arch=="arm" or (target_arch=="ia32" and host_arch=="x64"))) or (OS=="linux" and target_arch=="mipsel")', {
-          'linux_use_bundled_gold%': 1,
-        }, {
-          'linux_use_bundled_gold%': 0,
-        }],
-
-        # linux_use_bundled_binutils: whether to use the binary binutils
-        # checked into third_party/binutils.  These are not multi-arch so cannot
-        # be used except on x86 and x86-64 (the only two architectures which
-        # are currently checke in).  Force this off via GYP_DEFINES when you
-        # are using a custom toolchain and need to control -B in cflags.
-        ['OS=="linux" and (target_arch=="x64")', {
-          'linux_use_bundled_binutils%': 1,
-        }, {
-          'linux_use_bundled_binutils%': 0,
-        }],
-
-        # linux_use_gold_flags: whether to use build flags that rely on gold.
-        # On by default for x64 Linux.
-        ['OS=="linux" and target_arch=="x64"', {
-          'linux_use_gold_flags%': 1,
-        }, {
-          'linux_use_gold_flags%': 0,
-        }],
-
-        # linux_use_debug_fission: whether to use split DWARF debug info
-        # files. This can reduce link time significantly, but is incompatible
-        # with some utilities such as icecc and ccache. Requires gold and
-        # gcc >= 4.8 or clang.
-        # http://gcc.gnu.org/wiki/DebugFission
-        ['OS=="linux" and target_arch=="x64"', {
-          'linux_use_debug_fission%': 1,
-        }, {
-          'linux_use_debug_fission%': 0,
-        }],
-
-        ['OS=="android" or OS=="ios"', {
-          'enable_captive_portal_detection%': 0,
-        }, {
-          'enable_captive_portal_detection%': 1,
-        }],
-
-        # Enable Skia UI text drawing incrementally on different platforms.
-        # http://crbug.com/105550
-        #
-        # On Aura, this allows per-tile painting to be used in the browser
-        # compositor.
-        ['OS!="android" and OS!="ios"', {
-          'use_canvas_skia%': 1,
-        }],
-
-        ['chromeos==1', {
-          'enable_basic_printing%': 1,
-          'enable_print_preview%': 1,
-        }],
-
-        # Whether tests targets should be run, archived or just have the
-        # dependencies verified. All the tests targets have the '_run' suffix,
-        # e.g. base_unittests_run runs the target base_unittests. The test
-        # target always calls tools/swarming_client/isolate.py. See the script's
-        # --help for more information. Meant to be overriden with GYP_DEFINES.
-        # TODO(maruel): Remove the conditions as more configurations are
-        # supported.
-        ['OS!="ios" and OS!="android" and chromeos==0 and OS!="openbsd" and OS!="freebsd"', {
-          'test_isolation_mode%': 'check',
-        }, {
-          'test_isolation_mode%': 'noop',
-        }],
-        # Whether Android build uses OpenMAX DL FFT.
-        ['OS=="android" and ((target_arch=="arm" and arm_version >= 7) or target_arch=="ia32" or target_arch=="x64" or target_arch=="arm64" or target_arch=="mipsel")', {
-          # Currently only supported on Android ARMv7+, ARM64, ia32, x64 and mipsel.
-          # When enabled, this will also enable WebAudio support on
-          # Android for these architectures.  Default is enabled.  Whether
-          # WebAudio is actually available depends on runtime settings
-          # and flags.
-          'use_openmax_dl_fft%': 1,
-        }, {
-          'use_openmax_dl_fft%': 0,
-        }],
-        ['OS=="win" or OS=="linux" or OS=="openbsd" or OS=="freebsd"', {
-          'enable_mdns%' : 1,
-        }],
-
-        # Disable various features by default on embedded.
-        ['embedded==1', {
-          'remoting%': 0,
-          'enable_basic_printing%': 0,
-          'enable_print_preview%': 0,
-        }],
-
-        ['sysroot!=""', {
-          'pkg-config': '<(chroot_cmd) <(DEPTH)/build/linux/pkg-config-wrapper "<(sysroot)" "<(target_arch)" "<(system_libdir)"',
-        }, {
-          'pkg-config': 'pkg-config'
-        }],
-
-        # Enable WebVR support by default on Android
-        # Still requires command line flag to access API
-        ['OS=="android"', {
-          'enable_webvr%': 1,
-        }, {
-          'enable_webvr%': 0,
-        }],
-
-        ['order_profiling==0', {
-          # Set to 1 to enable fast builds. Set to 2 for even faster builds
-          # (it disables debug info for fastest compilation - only for use
-          # on compile-only bots).
-          'fastbuild%': 0,
-        }, {
-          # With instrumentation enabled, debug info puts libchrome.so over 4gb,
-          # which causes the linker to produce an invalid ELF.
-          # http://crbug.com/574476
-          'fastbuild%': 2,
-        }],
-      ],
-
-      # Kasko reporting is disabled by default, but may get enabled below.
-      'kasko%': 0,
-
-      # Setting this to '0' will cause V8's startup snapshot to be
-      # embedded in the binary instead of being a external files.
-      'v8_use_external_startup_data%': 1,
-
-      # Set this to 1 to enable use of concatenated impulse responses
-      # for the HRTF panner in WebAudio.
-      'use_concatenated_impulse_responses': 1,
-
-      # You can set the variable 'use_official_google_api_keys' to 1
-      # to use the Google-internal file containing official API keys
-      # for Google Chrome even in a developer build.  Setting this
-      # variable explicitly to 1 will cause your build to fail if the
-      # internal file is missing.
-      #
-      # The variable is documented here, but not handled in this file;
-      # see //google_apis/determine_use_official_keys.gypi for the
-      # implementation.
-      #
-      # Set the variable to 0 to not use the internal file, even when
-      # it exists in your checkout.
-      #
-      # Leave it unset in your include.gypi to have the variable
-      # implicitly set to 1 if you have
-      # src/google_apis/internal/google_chrome_api_keys.h in your
-      # checkout, and implicitly set to 0 if not.
-      #
-      # Note that official builds always behave as if the variable
-      # was explicitly set to 1, i.e. they always use official keys,
-      # and will fail to build if the internal file is missing.
-      #
-      # NOTE: You MUST NOT explicitly set the variable to 2 in your
-      # include.gypi or by other means. Due to subtleties of GYP, this
-      # is not the same as leaving the variable unset, even though its
-      # default value in
-      # //google_apis/determine_use_official_keys.gypi is 2.
-
-      # Set these to bake the specified API keys and OAuth client
-      # IDs/secrets into your build.
-      #
-      # If you create a build without values baked in, you can instead
-      # set environment variables to provide the keys at runtime (see
-      # src/google_apis/google_api_keys.h for details).  Features that
-      # require server-side APIs may fail to work if no keys are
-      # provided.
-      #
-      # Note that if you are building an official build or if
-      # use_official_google_api_keys has been set to 1 (explicitly or
-      # implicitly), these values will be ignored and the official
-      # keys will be used instead.
-      'google_api_key%': '',
-      'google_default_client_id%': '',
-      'google_default_client_secret%': '',
-      # Native Client is enabled by default.
-      'disable_nacl%': '0',
-
-      # Native Client toolchains, enabled by default.
-      'disable_pnacl%': 0,
-      'disable_newlib%': 0,
-
-      # Sets the default version name and code for Android app, by default we
-      # do a developer build.
-      'android_app_version_name%': 'Developer Build',
-      'android_app_version_code%': 1,
-
-      # Use the internal version of the framework to build Android WebView.
-      'use_webview_internal_framework%': 0,
-    },
-
-    # Copy conditionally-set variables out one scope.
-    'branding%': '<(branding)',
-    'branding_path_component%': '<(branding_path_component)',
-    'buildtype%': '<(buildtype)',
-    'target_arch%': '<(target_arch)',
-    'target_subarch%': '<(target_subarch)',
-    'mips_arch_variant%': '<(mips_arch_variant)',
-    'mips_dsp_rev%': '<(mips_dsp_rev)',
-    'mips_msa%': '<(mips_msa)',
-    'host_arch%': '<(host_arch)',
-    'toolkit_views%': '<(toolkit_views)',
-    'ui_compositor_image_transport%': '<(ui_compositor_image_transport)',
-    'use_aura%': '<(use_aura)',
-    'use_ash%': '<(use_ash)',
-    'use_cras%': '<(use_cras)',
-    'use_libpci%': '<(use_libpci)',
-    'use_openssl_certs%': '<(use_openssl_certs)',
-    'use_external_popup_menu%': '<(use_external_popup_menu)',
-    'use_nss_certs%': '<(use_nss_certs)',
-    'use_udev%': '<(use_udev)',
-    'os_bsd%': '<(os_bsd)',
-    'os_posix%': '<(os_posix)',
-    'use_dbus%': '<(use_dbus)',
-    'use_glib%': '<(use_glib)',
-    'use_pango%': '<(use_pango)',
-    'use_cairo%': '<(use_cairo)',
-    'use_ozone%': '<(use_ozone)',
-    'use_ozone_evdev%': '<(use_ozone_evdev)',
-    'use_xkbcommon%': '<(use_xkbcommon)',
-    'use_gtk3%': '<(use_gtk3)',
-    'use_clipboard_aurax11%': '<(use_clipboard_aurax11)',
-    'desktop_linux%': '<(desktop_linux)',
-    'use_x11%': '<(use_x11)',
-    'use_gnome_keyring%': '<(use_gnome_keyring)',
-    'linux_fpic%': '<(linux_fpic)',
-    'chromeos%': '<(chromeos)',
-    'chromecast%': '<(chromecast)',
-    'is_cast_desktop_build%': '<(is_cast_desktop_build)',
-    'enable_viewport%': '<(enable_viewport)',
-    'enable_hidpi%': '<(enable_hidpi)',
-    'enable_wayland_server%': '<(enable_wayland_server)',
-    'enable_wifi_display%': '<(enable_wifi_display)',
-    'image_loader_extension%': '<(image_loader_extension)',
-    'fastbuild%': '<(fastbuild)',
-    'win_z7%': '<(win_z7)',
-    'dcheck_always_on%': '<(dcheck_always_on)',
-    'tracing_like_official_build%': '<(tracing_like_official_build)',
-    'fieldtrial_testing_like_official_build%': '<(fieldtrial_testing_like_official_build)',
-    'arm_version%': '<(arm_version)',
-    'arm_neon%': '<(arm_neon)',
-    'arm_neon_optional%': '<(arm_neon_optional)',
-    'sysroot%': '<(sysroot)',
-    'use_sysroot%': '<(use_sysroot)',
-    'pkg-config%': '<(pkg-config)',
-    'chroot_cmd%': '<(chroot_cmd)',
-    'system_libdir%': '<(system_libdir)',
-    'component%': '<(component)',
-    'win_analyze%': '<(win_analyze)',
-    'win_fastlink%': '<(win_fastlink)',
-    'chrome_pgo_phase%': '<(chrome_pgo_phase)',
-    'full_wpo_on_official%': '<(full_wpo_on_official)',
-    'enable_resource_whitelist_generation%': '<(enable_resource_whitelist_generation)',
-    'use_titlecase_in_grd%': '<(use_titlecase_in_grd)',
-    'remoting%': '<(remoting)',
-    'enable_one_click_signin%': '<(enable_one_click_signin)',
-    'enable_media_router%': '<(enable_media_router)',
-    'enable_webrtc%': '<(enable_webrtc)',
-    'chromium_win_pch%': '<(chromium_win_pch)',
-    'configuration_policy': '<(configuration_policy)',
-    'safe_browsing%': '<(safe_browsing)',
-    'enable_web_speech%': '<(enable_web_speech)',
-    'enable_hotwording%': '<(enable_hotwording)',
-    'notifications%': '<(notifications)',
-    'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
-    'mac_want_real_dsym%': '<(mac_want_real_dsym)',
-    'asan%': '<(asan)',
-    'asan_blacklist%': '<(asan_blacklist)',
-    'sanitizer_coverage%': '<(sanitizer_coverage)',
-    'asan_field_padding%': '<(asan_field_padding)',
-    'use_sanitizer_options%': '<(use_sanitizer_options)',
-    'syzyasan%': '<(syzyasan)',
-    'kasko%': '<(kasko)',
-    'syzygy_optimize%': '<(syzygy_optimize)',
-    'lsan%': '<(lsan)',
-    'msan%': '<(msan)',
-    'msan_blacklist%': '<(msan_blacklist)',
-    'msan_track_origins%': '<(msan_track_origins)',
-    'tsan%': '<(tsan)',
-    'tsan_blacklist%': '<(tsan_blacklist)',
-    'ubsan%': '<(ubsan)',
-    'ubsan_blacklist%': '<(ubsan_blacklist)',
-    'ubsan_security%': '<(ubsan_security)',
-    'ubsan_security_blacklist%': '<(ubsan_security_blacklist)',
-    'ubsan_vptr%': '<(ubsan_vptr)',
-    'ubsan_vptr_blacklist%': '<(ubsan_vptr_blacklist)',
-    'use_instrumented_libraries%': '<(use_instrumented_libraries)',
-    'use_prebuilt_instrumented_libraries%': '<(use_prebuilt_instrumented_libraries)',
-    'use_custom_libcxx%': '<(use_custom_libcxx)',
-    'order_profiling%': '<(order_profiling)',
-    'order_text_section%': '<(order_text_section)',
-    'enable_extensions%': '<(enable_extensions)',
-    'enable_pdf%': '<(enable_pdf)',
-    'pdf_enable_v8%': '<(pdf_enable_v8)',
-    'pdf_enable_xfa%': '<(pdf_enable_xfa)',
-    'enable_plugin_installation%': '<(enable_plugin_installation)',
-    'enable_plugins%': '<(enable_plugins)',
-    'enable_session_service%': '<(enable_session_service)',
-    'enable_themes%': '<(enable_themes)',
-    'linux_use_bundled_gold%': '<(linux_use_bundled_gold)',
-    'linux_use_bundled_binutils%': '<(linux_use_bundled_binutils)',
-    'linux_use_gold_flags%': '<(linux_use_gold_flags)',
-    'linux_use_debug_fission%': '<(linux_use_debug_fission)',
-    'use_canvas_skia%': '<(use_canvas_skia)',
-    'test_isolation_mode%': '<(test_isolation_mode)',
-    'enable_basic_printing%': '<(enable_basic_printing)',
-    'enable_print_preview%': '<(enable_print_preview)',
-    'enable_spellcheck%': '<(enable_spellcheck)',
-    'use_browser_spellchecker%': '<(use_browser_spellchecker)',
-    'use_minikin_hyphenation%': '<(use_minikin_hyphenation)',
-    'cld2_table_size%': '<(cld2_table_size)',
-    'enable_captive_portal_detection%': '<(enable_captive_portal_detection)',
-    'disable_file_support%': '<(disable_file_support)',
-    'disable_ftp_support%': '<(disable_ftp_support)',
-    'use_platform_icu_alternatives%': '<(use_platform_icu_alternatives)',
-    'disable_brotli_filter%': '<(disable_brotli_filter)',
-    'enable_task_manager%': '<(enable_task_manager)',
-    'wix_path%': '<(wix_path)',
-    'use_libjpeg_turbo%': '<(use_libjpeg_turbo)',
-    'use_system_libjpeg%': '<(use_system_libjpeg)',
-    'android_channel%': '<(android_channel)',
-    'icu_use_data_file_flag%': '<(icu_use_data_file_flag)',
-    'gyp_managed_install%': 0,
-    'create_standalone_apk%': 1,
-    'enable_app_list%': '<(enable_app_list)',
-    'use_default_render_theme%': '<(use_default_render_theme)',
-    'google_api_key%': '<(google_api_key)',
-    'google_default_client_id%': '<(google_default_client_id)',
-    'google_default_client_secret%': '<(google_default_client_secret)',
-    'enable_supervised_users%': '<(enable_supervised_users)',
-    'enable_mdns%' : '<(enable_mdns)',
-    'enable_service_discovery%' : '<(enable_service_discovery)',
-    'enable_hangout_services_extension%' : '<(enable_hangout_services_extension)',
-    'proprietary_codecs%': '<(proprietary_codecs)',
-    'use_goma%': '<(use_goma)',
-    'gomadir%': '<(gomadir)',
-    'use_lto%': '<(use_lto)',
-    'use_lto_o2%': '<(use_lto_o2)',
-    'gold_icf_level%': '<(gold_icf_level)',
-    'v8_use_external_startup_data%': '<(v8_use_external_startup_data)',
-    'cfi_vptr%': '<(cfi_vptr)',
-    'cfi_cast%': '<(cfi_cast)',
-    'cfi_diag%': '<(cfi_diag)',
-    'cfi_blacklist%': '<(cfi_blacklist)',
-    'mac_views_browser%': '<(mac_views_browser)',
-    'android_app_version_name%': '<(android_app_version_name)',
-    'android_app_version_code%': '<(android_app_version_code)',
-    'use_webview_internal_framework%': '<(use_webview_internal_framework)',
-    'enable_webvr%': '<(enable_webvr)',
-
-    # Turns on compiler optimizations in V8 in Debug build.
-    'v8_optimized_debug%': 1,
-
-    # Use system protobuf instead of bundled one.
-    'use_system_protobuf%': 0,
-
-    # Use system yasm instead of bundled one.
-    'use_system_yasm%': 0,
-
-    # Use system ICU instead of bundled one.
-    'use_system_icu%' : 0,
-
-    # Default to enabled PIE; this is important for ASLR but we may need to be
-    # able to turn it off for various reasons.
-    'linux_disable_pie%': 0,
-
-    # The release channel that this build targets. This is used to restrict
-    # channel-specific build options, like which installer packages to create.
-    # The default is 'all', which does no channel-specific filtering.
-    'channel%': 'all',
-
-    # Override chromium_mac_pch and set it to 0 to suppress the use of
-    # precompiled headers on the Mac.  Prefix header injection may still be
-    # used, but prefix headers will not be precompiled.  This is useful when
-    # using distcc to distribute a build to compile slaves that don't
-    # share the same compiler executable as the system driving the compilation,
-    # because precompiled headers rely on pointers into a specific compiler
-    # executable's image.  Setting this to 0 is needed to use an experimental
-    # Linux-Mac cross compiler distcc farm.
-    'chromium_mac_pch%': 1,
-
-    # The default value for mac_strip in target_defaults. This cannot be
-    # set there, per the comment about variable% in a target_defaults.
-    'mac_strip_release%': 0,
-
-    # Set to 1 to enable java code coverage. Instruments classes during build
-    # to produce .ec files during runtime.
-    'emma_coverage%': 0,
-
-    # EMMA filter string consisting of a list of inclusion/exclusion patterns
-    # separated with whitespace and/or comma. Only has effect if
-    # 'emma_coverage=1'.
-    'emma_filter%': '',
-
-    # Set to 1 to enable running Android lint on java/class files.
-    'android_lint%': 1,
-
-    # Although base/allocator lets you select a heap library via an
-    # environment variable, the shim it uses sometimes gets in the way.
-    # To disable it entirely, and switch to normal msvcrt, do e.g.
-    #  'win_use_allocator_shim': 0,
-    #  'win_release_RuntimeLibrary': 2
-    # to ~/.gyp/include.gypi, gclient runhooks --force, and do a release build.
-    'win_use_allocator_shim%': 1, # 1 = shim allocator; 0 = msvcrt
-
-    # Enables the unified allocator shim (experimental) which routes all the
-    # alloc calls to base/. Right now is supported on Linux Desktop only.
-    # http://crbug.com/550886 .
-    'use_experimental_allocator_shim%': 0,
-
-    # TODO(bradnelson): eliminate this when possible.
-    # To allow local gyp files to prevent release.vsprops from being included.
-    # Yes(1) means include release.vsprops.
-    # Once all vsprops settings are migrated into gyp, this can go away.
-    'msvs_use_common_release%': 1,
-
-    # TODO(bradnelson): eliminate this when possible.
-    # To allow local gyp files to override additional linker options for msvs.
-    # Yes(1) means set use the common linker options.
-    'msvs_use_common_linker_extras%': 1,
-
-    # TODO(sgk): eliminate this if possible.
-    # It would be nicer to support this via a setting in 'target_defaults'
-    # in chrome/app/locales/locales.gypi overriding the setting in the
-    # 'Debug' configuration in the 'target_defaults' dict below,
-    # but that doesn't work as we'd like.
-    'msvs_debug_link_incremental%': '2',
-
-    # Needed for some of the largest modules.
-    'msvs_debug_link_nonincremental%': '1',
-
-    # Turns on Use Library Dependency Inputs for linking chrome.dll on Windows
-    # to get incremental linking to be faster in debug builds.
-    'incremental_chrome_dll%': '0',
-
-    # Experimental setting to break chrome.dll into multiple pieces based on
-    # process type.
-    'chrome_multiple_dll%': '0',
-
-    # Whether the VS xtree header has been patched to disable warning 4702. If
-    # it has, then we don't need to disable 4702 (unreachable code warning).
-    # The patch is preapplied to the internal toolchain and hence all bots.
-    'msvs_xtree_patched%': '<!pymod_do_main(win_is_xtree_patched)',
-
-    # Clang stuff.
-    'clang%': '<(clang)',
-    'host_clang%': '<(host_clang)',
-    'make_clang_dir%': '<(make_clang_dir)',
-    'use_lld%': '<(use_lld)',
-
-    # Control which version of clang to use when building for iOS.  If set to
-    # '1', uses the version of clang that ships with Xcode.  If set to '0', uses
-    # the version of clang that ships with the Chromium source.  This variable
-    # is automatically set to '1' in Official builds.
-    'clang_xcode%': 0,
-
-    # These two variables can be set in GYP_DEFINES while running
-    # |gclient runhooks| to let clang run a plugin in every compilation.
-    # Only has an effect if 'clang=1' is in GYP_DEFINES as well.
-    # Example:
-    #     GYP_DEFINES='clang=1 clang_load=/abs/path/to/libPrintFunctionNames.dylib clang_add_plugin=print-fns' gclient runhooks
-
-    'clang_load%': '',
-    'clang_add_plugin%': '',
-
-    # Tell ld64 to write map files describing binary layout. Useful
-    # for looking at what contributes to binary size, e.g. with
-    # https://github.com/nico/bloat
-    'mac_write_linker_maps%': 0,
-
-    # The default type of gtest.
-    'gtest_target_type%': 'executable',
-
-    # Enable sampling based profiler.
-    # See http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
-    'profiling%': '0',
-    # Profile without optimizing out stack frames when profiling==1.
-    'profiling_full_stack_frames%': '0',
-
-    # And if we want to dump symbols for Breakpad-enabled builds.
-    'linux_dump_symbols%': 0,
-    # And if we want to strip the binary after dumping symbols.
-    'linux_strip_binary%': 0,
-    # If we want stack unwind support for backtrace().
-    'debug_unwind_tables%': 1,
-    'release_unwind_tables%': 1,
-
-    # Override where to find binutils
-    'binutils_version%': 0,
-    'binutils_dir%': '',
-
-    # Enable TCMalloc.
-    # Default of 'use_allocator' is set to 'none' if OS=='android' later.
-    'use_allocator%': 'tcmalloc',
-
-    # Set to 1 to link against gsettings APIs instead of using dlopen().
-    'linux_link_gsettings%': 0,
-
-    # Enable use of OpenMAX DL FFT routines.
-    'use_openmax_dl_fft%': '<(use_openmax_dl_fft)',
-
-    # Enable new NPDevice API.
-    'enable_new_npdevice_api%': 0,
-
-    # .gyp files or targets should set chromium_code to 1 if they build
-    # Chromium-specific code, as opposed to external code.  This variable is
-    # used to control such things as the set of warnings to enable, and
-    # whether warnings are treated as errors.
-    'chromium_code%': 0,
-
-    # Disable fatal linker warnings, similarly to how we make it possible
-    # to disable -Werror (e.g. for different toolchain versions).
-    'disable_fatal_linker_warnings%': 0,
-
-    'release_valgrind_build%': 0,
-
-    # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
-    'enable_wexit_time_destructors%': 0,
-
-    # Set to 1 to compile with the OpenGL ES 2.0 conformance tests.
-    'internal_gles2_conform_tests%': 0,
-
-    # Set to 1 to compile with the Khronos GL-CTS conformance tests.
-    'internal_khronos_glcts_tests%': 0,
-
-    # Set to 1 to compile the filter fuzzer.
-    'internal_filter_fuzzer%': 0,
-
-    # NOTE: When these end up in the Mac bundle, we need to replace '-' for '_'
-    # so Cocoa is happy (http://crbug.com/20441).
-    'locales': [
-      'am', 'ar', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en-GB',
-      'en-US', 'es-419', 'es', 'et', 'fa', 'fi', 'fil', 'fr', 'gu', 'he',
-      'hi', 'hr', 'hu', 'id', 'it', 'ja', 'kn', 'ko', 'lt', 'lv',
-      'ml', 'mr', 'ms', 'nb', 'nl', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru',
-      'sk', 'sl', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tr', 'uk',
-      'vi', 'zh-CN', 'zh-TW',
-    ],
-
-    # Pseudo locales are special locales which are used for testing and
-    # debugging. They don't get copied to the final app. For more info,
-    # check out https://www.chromium.org/developers/testing/fake-bidi
-    'pseudo_locales': [
-      'fake-bidi',
-    ],
-
-    'grit_defines': [],
-
-    # If debug_devtools is set to 1, JavaScript files for DevTools are
-    # stored as is and loaded from disk. Otherwise, a concatenated file
-    # is stored in resources.pak. It is still possible to load JS files
-    # from disk by passing --debug-devtools cmdline switch.
-    'debug_devtools%': 0,
-
-    # The Java Bridge is not compiled in by default.
-    'java_bridge%': 0,
-
-    # Code signing for iOS binaries.  The bots need to be able to disable this.
-    'chromium_ios_signing%': 1,
-
-    # Identity to use for code signing of iOS binaries.  Change this on machines
-    # with multiple identities in their security keychain.
-    'chromium_ios_signing_identity%': 'iPhone Developer',
-
-    # This flag is only used when disable_nacl==0 and disables all those
-    # subcomponents which would require the installation of a native_client
-    # untrusted toolchain.
-    'disable_nacl_untrusted%': 0,
-
-    # PNaCl toolchain does not support sanitizers. Disable by default.
-    'enable_nacl_nonsfi_test%': 0,
-
-    # Disable Dart by default.
-    'enable_dart%': 0,
-
-    # Copy out the setting of disable_nacl.
-    'disable_nacl%': '<(disable_nacl)',
-
-    # Native Client toolchains, enabled by default.
-    'disable_pnacl%': '<(disable_pnacl)',
-    'disable_newlib%': '<(disable_newlib)',
-
-    # Whether to build full debug version for Debug configuration on Android.
-    # Compared to full debug version, the default Debug configuration on Android
-    # has no full v8 debug, has size optimization and linker gc section, so that
-    # we can build a debug version with acceptable size and performance.
-    'android_full_debug%': 0,
-
-    # Contains data about the attached devices for gyp_managed_install.
-    'build_device_config_path': '<(PRODUCT_DIR)/build_devices.cfg',
-
-    'wix_exists': '<!pymod_do_main(dir_exists "<(wix_path)")',
-
-    'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/10',
-    'directx_sdk_default_path': '<(DEPTH)/third_party/directxsdk/files',
-
-    # Whether we are using the rlz library or not.  Platforms like Android send
-    # rlz codes for searches but do not use the library.
-    'enable_rlz_support%': 0,
-    'enable_rlz%': 0,
-
-    # Turns on the i18n support in V8.
-    'v8_enable_i18n_support': 1,
-
-    # Compile the v8 shell for the host toolset.
-    'v8_toolset_for_shell': 'host',
-
-    # V8 extras
-    # Adding V8 extras files requires API owners review
-    # Be sure to synchronize with build/module_args/v8.gni
-
-    'v8_extra_library_files': [
-      '../third_party/WebKit/Source/core/streams/ByteLengthQueuingStrategy.js',
-      '../third_party/WebKit/Source/core/streams/CountQueuingStrategy.js',
-      '../third_party/WebKit/Source/core/streams/ReadableStream.js',
-    ],
-    'v8_experimental_extra_library_files': [
-    ],
-
-    # Use brlapi from brltty for braille display support.
-    'use_brlapi%': 0,
-
-    # Relative path to icu.gyp from this file.
-    'icu_gyp_path': '../third_party/icu/icu.gyp',
-
-    # IPC fuzzer is disabled by default.
-    'enable_ipc_fuzzer%': 0,
-
-    # Force disable libstdc++ debug mode.
-    'disable_glibcxx_debug%': 0,
-
-    # Support ChromeOS touchpad gestures with ozone.
-    'use_evdev_gestures%': 0,
-
-    # Default ozone platform (if no --ozone-platform flag).
-    'ozone_platform%': "",
-
-    # Ozone platforms to include in the build.
-    'ozone_platform_caca%': 0,
-    'ozone_platform_cast%': 0,
-    'ozone_platform_gbm%': 0,
-    'ozone_platform_headless%': 0,
-    'ozone_platform_wayland%': 0,
-
-    # Experiment: http://crbug.com/426914
-    'envoy%': 0,
-
-    # Used to set libjpeg_gyp_path. Chrome OS ui/gfx/gfx.gyp uses the IJG path
-    # for robust login screen decoding.
-    'libjpeg_ijg_gyp_path': '<(DEPTH)/third_party/libjpeg/libjpeg.gyp',
-    'libjpeg_turbo_gyp_path': '<(DEPTH)/third_party/libjpeg_turbo/libjpeg.gyp',
-
-    'conditions': [
-      # Enable the Syzygy optimization step for the official builds.
-      ['OS=="win" and buildtype=="Official" and syzyasan!=1 and clang!=1', {
-        'syzygy_optimize%': 1,
-      }, {
-        'syzygy_optimize%': 0,
-      }],
-      ['sanitizer_coverage==1', {
-        'sanitizer_coverage': 'edge,indirect-calls,8bit-counters',
-      }],
-      # Get binutils version so we can enable debug fission if we can.
-      ['os_posix==1 and OS!="mac" and OS!="ios"', {
-        'conditions': [
-          # compiler_version doesn't work with clang
-          # TODO(mithro): Land https://codereview.chromium.org/199793014/ so
-          # compiler_version works with clang.
-          # TODO(glider): set clang to 1 earlier for ASan and TSan builds so
-          # that it takes effect here.
-          ['clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan==0 and ubsan_security==0 and ubsan_vptr==0', {
-            'binutils_version%': '<!pymod_do_main(compiler_version target assembler)',
-          }],
-          # On Android we know the binutils version in the toolchain.
-          ['OS=="android"', {
-            'binutils_version%': 222,
-          }],
-          ['host_arch=="x64"', {
-            'binutils_dir%': 'third_party/binutils/Linux_x64/Release/bin',
-          }],
-          ['host_arch=="ia32"', {
-            'binutils_dir%': 'third_party/binutils/Linux_ia32/Release/bin',
-          }],
-          # Our version of binutils in third_party/binutils
-          ['linux_use_bundled_binutils==1', {
-            'binutils_version%': 224,
-          }],
-        ],
-      }, {
-        'binutils_version%': 0,
-      }],
-      ['OS=="win" and "<!pymod_do_main(dir_exists <(directx_sdk_default_path))"=="True"', {
-        'directx_sdk_path%': '<(directx_sdk_default_path)',
-      }, {
-        'directx_sdk_path%': '$(DXSDK_DIR)',
-      }],
-      ['OS=="win"', {
-        'windows_driver_kit_path%': '$(WDK_DIR)',
-        'conditions': [
-          ['component!="shared_library"', {
-            'single_module_mode_handle_verifier%': 0,
-          }, {
-            'single_module_mode_handle_verifier%': 1,
-          }],
-        ],
-      }],
-      ['os_posix==1 and OS!="mac" and OS!="ios"', {
-        'conditions': [
-          ['target_arch=="mipsel" or target_arch=="mips64el"', {
-            'werror%': '',
-            'disable_nacl%': 1,
-            'nacl_untrusted_build%': 0,
-            'use_allocator%': 'none',
-          }],
-          # Use a 64-bit linker to avoid running out of address space. The
-          # buildbots should have a 64-bit kernel and a 64-bit libc installed.
-          ['host_arch=="ia32" and target_arch=="ia32"', {
-            # TODO(thestig) This is a horrible way to force the desired
-            # configuration. Our gyp variable scoping is likely wrong and
-            # needs to be cleaned up. The GN configuration should be changed
-            # to match.
-            'binutils_version%': 224,
-            'linux_use_bundled_binutils%': '1',
-            'linux_use_bundled_gold%': '1',
-            'binutils_dir%': 'third_party/binutils/Linux_x64/Release/bin',
-          }],
-          # All Chrome builds have breakpad symbols, but only process the
-          # symbols from official builds.
-          ['(branding=="Chrome" and buildtype=="Official")', {
-            'linux_dump_symbols%': 1,
-
-            # Omit unwind support in official release builds to save space. We
-            # can use breakpad for these builds.
-            'release_unwind_tables%': 0,
-          }],
-        ],
-      }],  # os_posix==1 and OS!="mac" and OS!="ios"
-      ['OS=="ios"', {
-        'disable_nacl%': 1,
-        'icu_use_data_file_flag%': 1,
-        'enable_web_speech%': 0,
-        'use_system_libxml%': 1,
-        'use_system_sqlite%': 1,
-        'locales==': [
-          'ar', 'ca', 'cs', 'da', 'de', 'el', 'en-GB', 'en-US', 'es', 'es-MX',
-          'fi', 'fr', 'he', 'hi', 'hr', 'hu', 'id', 'it', 'ja', 'ko', 'ms',
-          'nb', 'nl', 'pl', 'pt', 'pt-PT', 'ro', 'ru', 'sk', 'sv', 'th', 'tr',
-          'uk', 'vi', 'zh-CN', 'zh-TW',
-        ],
-
-        # iOS SDK and deployment target support.  The |ios_sdk| value is left
-        # blank so that when it is set in the project files it will be the
-        # "current" iOS SDK.  Forcing a specific SDK even if it is "current"
-        # causes Xcode to spit out a warning for every single project file for
-        # not using the "current" SDK.
-        'ios_sdk%': '',
-        'ios_sdk_path%': '',
-        'ios_deployment_target%': '9.0',
-
-        'conditions': [
-          # ios_product_name is set to the name of the .app bundle as it should
-          # appear on disk.
-          ['branding=="Chrome"', {
-            'ios_product_name%': 'Chrome',
-          }, { # else: branding!="Chrome"
-            'ios_product_name%': 'Chromium',
-          }],
-          ['branding=="Chrome" and buildtype=="Official"', {
-            'ios_breakpad%': 1,
-          }, { # else: branding!="Chrome" or buildtype!="Official"
-            'ios_breakpad%': 0,
-          }],
-        ],
-      }],  # OS=="ios"
-      ['OS=="android"', {
-        # Location of Android NDK.
-        'variables': {
-          'variables': {
-            # Standard libraries can use the relative path to the NDK.
-            'android_ndk_root%': '../../third_party/android_tools/ndk/',
-            # Unfortunately, it is required to use the absolute path to the SDK
-            # because it us passed to ant which uses a different relative path
-            # from GYP.
-            'android_sdk_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/sdk/',
-            # Similarly, gdbserver and the Android toolchain need to use the
-            # absolute path to the NDK because they are used at different levels
-            # in the GYP files.
-            'android_ndk_absolute_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/ndk/',
-            'android_host_arch%': '<!(uname -m)',
-            # Version of the NDK. Used to ensure full rebuilds on NDK rolls.
-            'android_ndk_version%': 'r10e',
-            # Android API-level of the SDK used for compilation.
-            'android_sdk_version%': '23',
-            'android_sdk_build_tools_version%': '23.0.1',
-            'host_os%': "<!(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')",
-
-            'conditions': [
-              # Figure this out early since it needs symbols from libgcc.a, so it
-              # has to be before that in the set of libraries.
-              # ASan needs to dynamically link to libc++ even in static builds so
-              # that it can interpose operator new.
-              ['component=="shared_library" or asan==1', {
-                  'android_libcpp_library': 'c++_shared',
-                  'android_must_copy_system_libraries': 1,
-              }, {
-                  'android_libcpp_library': 'c++_static',
-                  'android_must_copy_system_libraries': 0,
-              }],
-            ],
-
-          },
-          # Copy conditionally-set variables out one scope.
-          'android_ndk_root%': '<(android_ndk_root)',
-          'android_ndk_absolute_root%': '<(android_ndk_absolute_root)',
-          'android_ndk_version%': '<(android_ndk_version)',
-          'android_sdk_root%': '<(android_sdk_root)',
-          'android_sdk_version%': '<(android_sdk_version)',
-          'android_sdk_build_tools_version%': '<(android_sdk_build_tools_version)',
-          'android_libcpp_root': '<(android_ndk_root)/sources/cxx-stl/llvm-libc++',
-          'android_libcpp_library': '<(android_libcpp_library)',
-          'android_must_copy_system_libraries': '<(android_must_copy_system_libraries)',
-          'host_os%': '<(host_os)',
-
-          'android_sdk%': '<(android_sdk_root)/platforms/android-<(android_sdk_version)',
-          # Android SDK build tools (e.g. dx, aidl)
-          'android_sdk_tools%': '<(android_sdk_root)/build-tools/<(android_sdk_build_tools_version)',
-
-          # Android API level 16 is JB (Android 4.1) which is the minimum
-          # platform requirement for Chrome on Android, we use it for native
-          # code compilation.
-          'conditions': [
-            ['target_arch == "ia32"', {
-              'android_app_abi%': 'x86',
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-x86/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-16/arch-x86',
-              'android_ndk_lib_dir%': 'usr/lib',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/x86-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-            ['target_arch == "x64"', {
-              'android_app_abi%': 'x86_64',
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-x86_64/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-21/arch-x86_64',
-              'android_ndk_lib_dir%': 'usr/lib64',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/x86_64-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-            ['target_arch=="arm"', {
-              'conditions': [
-                ['arm_version<7', {
-                  'android_app_abi%': 'armeabi',
-                }, {
-                  'android_app_abi%': 'armeabi-v7a',
-                }],
-              ],
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-arm/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-16/arch-arm',
-              'android_ndk_lib_dir%': 'usr/lib',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/arm-linux-androideabi-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-            ['target_arch == "arm64"', {
-              'android_app_abi%': 'arm64-v8a',
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-arm64/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-21/arch-arm64',
-              'android_ndk_lib_dir%': 'usr/lib',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/aarch64-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-            ['target_arch == "mipsel"', {
-              'android_app_abi%': 'mips',
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-mips/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-16/arch-mips',
-              'android_ndk_lib_dir%': 'usr/lib',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/mipsel-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-            ['target_arch == "mips64el"', {
-              'android_app_abi%': 'mips64',
-              'android_gdbserver%': '<(android_ndk_absolute_root)/prebuilt/android-mips64/gdbserver/gdbserver',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-21/arch-mips64',
-              'android_ndk_lib_dir%': 'usr/lib64',
-              'android_toolchain%': '<(android_ndk_absolute_root)/toolchains/mips64el-linux-android-4.9/prebuilt/<(host_os)-<(android_host_arch)/bin',
-            }],
-          ],
-        },
-        # Copy conditionally-set variables out one scope.
-        'android_app_abi%': '<(android_app_abi)',
-        'android_gdbserver%': '<(android_gdbserver)',
-        'android_ndk_root%': '<(android_ndk_root)',
-        'android_ndk_sysroot%': '<(android_ndk_sysroot)',
-        'android_ndk_version%': '<(android_ndk_version)',
-        'android_sdk_root%': '<(android_sdk_root)',
-        'android_sdk_version%': '<(android_sdk_version)',
-        'android_toolchain%': '<(android_toolchain)',
-
-        'android_ndk_include': '<(android_ndk_sysroot)/usr/include',
-        'android_ndk_lib': '<(android_ndk_sysroot)/<(android_ndk_lib_dir)',
-        'android_sdk_build_tools_version%': '<(android_sdk_build_tools_version)',
-        'android_sdk_tools%': '<(android_sdk_tools)',
-        'android_aapt_path%': '<(android_sdk_tools)/aapt',
-        'android_sdk%': '<(android_sdk)',
-        'android_sdk_jar%': '<(android_sdk)/android.jar',
-
-        'android_libcpp_root': '<(android_libcpp_root)',
-        'android_libcpp_library': '<(android_libcpp_library)',
-        'android_libcpp_include': '<(android_libcpp_root)/libcxx/include',
-        'android_libcpp_libs_dir%': '<(android_libcpp_root)/libs/<(android_app_abi)',
-        'android_must_copy_system_libraries': '<(android_must_copy_system_libraries)',
-        'host_os%': '<(host_os)',
-
-        # Location of the "objcopy" binary, used by both gyp and scripts.
-        'android_objcopy%' : '<!(/bin/echo -n <(android_toolchain)/*-objcopy)',
-
-        # Location of the "strip" binary, used by both gyp and scripts.
-        'android_strip%' : '<!(/bin/echo -n <(android_toolchain)/*-strip)',
-
-        # Location of the "readelf" binary.
-        'android_readelf%' : '<!(/bin/echo -n <(android_toolchain)/*-readelf)',
-
-        # Determines whether we should optimize JNI generation at the cost of
-        # breaking assumptions in the build system that when inputs have changed
-        # the outputs should always change as well.  This is meant purely for
-        # developer builds, to avoid spurious re-linking of native files.
-        'optimize_jni_generation%': '<(optimize_jni_generation)',
-
-        # Use OpenSSL's struct X509 to represent certificates.
-        'use_openssl_certs%': 1,
-
-        'proprietary_codecs%': '<(proprietary_codecs)',
-
-        'safe_browsing%': 2,
-
-        'enable_web_speech%': 0,
-        'java_bridge%': 1,
-        'use_allocator%': 'none',
-
-        # Disable Native Client.
-        'disable_nacl%': 1,
-
-        # Sessions are store separately in the Java side.
-        'enable_session_service%': 0,
-
-        'p2p_apis%' : 0,
-
-        'gtest_target_type%': 'shared_library',
-      }],  # OS=="android"
-      ['embedded==1', {
-        'use_system_fontconfig%': 0,
-      }, {
-        'use_system_fontconfig%': 1,
-      }],
-      ['chromecast==1', {
-        'conditions': [
-          ['target_arch=="arm"', {
-            'arm_arch%': '',
-            'arm_tune%': 'cortex-a9',
-            'arm_thumb%': 1,
-          }],
-          # TODO(dalecurtis): What audio codecs does Chromecast want here?  Sort
-          # out and add configs if necessary.  http://crbug.com/570754
-          ['OS!="android"', {
-            'ffmpeg_branding%': 'ChromeOS',
-          }],
-        ],
-      }],
-      ['OS=="linux"', {
-        'clang%': 1,
-        'conditions': [
-          ['target_arch=="arm64"', {
-            # Temporarily disable nacl and tcmalloc on arm64 linux to get
-            # rid of compilation errors.
-            'disable_nacl%': 1,
-            'use_allocator%': 'none',
-          }],
-        ],
-      }],  # OS=="mac"
-      ['OS=="mac"', {
-        'conditions': [
-          # All Chrome builds have breakpad symbols, but only process the
-          # symbols from official builds.
-          ['(branding=="Chrome" and buildtype=="Official")', {
-            'mac_strip_release%': 1,
-          }],
-        ],
-      }],  # OS=="mac"
-      ['OS=="mac" or OS=="ios"', {
-        'clang%': 1,
-
-        # On Mac and iOS we just use the default system allocator.
-        'use_allocator%': 'none',
-
-        'variables': {
-          # Mac OS X SDK and deployment target support.  The SDK identifies
-          # the version of the system headers that will be used, and
-          # corresponds to the MAC_OS_X_VERSION_MAX_ALLOWED compile-time
-          # macro.  "Maximum allowed" refers to the operating system version
-          # whose APIs are available in the headers.  The deployment target
-          # identifies the minimum system version that the built products are
-          # expected to function on.  It corresponds to the
-          # MAC_OS_X_VERSION_MIN_REQUIRED compile-time macro.  To ensure these
-          # macros are available, #include <AvailabilityMacros.h>.  Additional
-          # documentation on these macros is available at
-          # http://developer.apple.com/mac/library/technotes/tn2002/tn2064.html#SECTION3
-          # Chrome normally builds with the Mac OS X 10.10 SDK and sets the
-          # deployment target to 10.7.  Other projects, such as O3D, may
-          # override these defaults.
-
-          # Normally, mac_sdk_min is used to find an SDK that Xcode knows
-          # about that is at least the specified version. In official builds,
-          # the SDK must match mac_sdk_min exactly. If the SDK is installed
-          # someplace that Xcode doesn't know about, set mac_sdk_path to the
-          # path to the SDK; when set to a non-empty string, SDK detection
-          # based on mac_sdk_min will be bypassed entirely.
-          'mac_deployment_target%': '10.7',
-          'mac_sdk_min%': '10.10',
-          'mac_sdk_path%': '',
-        },
-
-        'mac_sdk_min': '<(mac_sdk_min)',
-        'mac_sdk_path': '<(mac_sdk_path)',
-        'mac_deployment_target': '<(mac_deployment_target)',
-
-        # Compile in Breakpad support by default so that it can be
-        # tested, even if it is not enabled by default at runtime.
-        'mac_breakpad_compiled_in%': 1,
-        'conditions': [
-          # mac_product_name is set to the name of the .app bundle as it should
-          # appear on disk.  This duplicates data from
-          # chrome/app/theme/chromium/BRANDING and
-          # chrome/app/theme/google_chrome/BRANDING, but is necessary to get
-          # these names into the build system.
-          ['branding=="Chrome"', {
-            'mac_product_name%': 'Google Chrome',
-          }, { # else: branding!="Chrome"
-            'mac_product_name%': 'Chromium',
-          }],
-          # Official mac builds require a specific OS X SDK, but iOS and
-          # non-official mac builds do not.
-          ['branding=="Chrome" and buildtype=="Official" and OS=="mac"', {
-            'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py --verify <(mac_sdk_min) --sdk_path=<(mac_sdk_path))',
-          }, {
-            'mac_sdk%': '<!(python <(DEPTH)/build/mac/find_sdk.py <(mac_sdk_min))',
-          }],
-          ['branding=="Chrome" and buildtype=="Official"', {
-            # Enable uploading crash dumps.
-            'mac_breakpad_uploads%': 1,
-            # Enable dumping symbols at build time for use by Mac Breakpad.
-            'mac_breakpad%': 1,
-            # Enable Keystone auto-update support.
-            'mac_keystone%': 1,
-          }, { # else: branding!="Chrome" or buildtype!="Official"
-            'mac_breakpad_uploads%': 0,
-            'mac_breakpad%': 0,
-            'mac_keystone%': 0,
-          }],
-        ],
-      }],  # OS=="mac" or OS=="ios"
-      ['OS=="win"', {
-        'conditions': [
-          # This is the architecture convention used in WinSDK paths.
-          ['target_arch=="ia32"', {
-            'winsdk_arch%': 'x86',
-          },{
-            'winsdk_arch%': '<(target_arch)',
-          }],
-          ['component=="shared_library"', {
-            'win_use_allocator_shim%': 0,
-          }],
-          ['component=="static_library"', {
-            # Turn on multiple dll by default on Windows when in static_library.
-            'chrome_multiple_dll%': 1,
-          }],
-          ['asan==1 or syzyasan==1', {
-            'win_use_allocator_shim%': 0,
-          }],
-          # The AddressSanitizer build should be a console program as it prints
-          # out stuff on stderr.
-          ['asan==1', {
-            'win_console_app%': 1,
-          }, {
-            'win_console_app%': 0,
-          }],
-          # Enable the Kasko reporter for syzyasan builds.
-          ['syzyasan==1', {
-            'kasko': 1,
-          }],
-          ['component=="shared_library"', {
-            # Not enabled for component=static_library because some targets
-            # are too large and the toolchain fails due to the size of the
-            # .obj files.
-            'incremental_chrome_dll%': 1,
-          }],
-          # Don't do incremental linking for large modules on 32-bit or when
-          # component=static_library as the toolchain fails due to the size of
-          # the .ilk files.
-          ['MSVS_OS_BITS==32 or component=="static_library"', {
-            'msvs_large_module_debug_link_mode%': '1',  # No
-          },{
-            'msvs_large_module_debug_link_mode%': '2',  # Yes
-          }],
-          ['chrome_pgo_phase!=0', {
-            'full_wpo_on_official%': 1,
-          }],
-        ],
-        'nacl_win64_defines': [
-          # This flag is used to minimize dependencies when building
-          # Native Client loader for 64-bit Windows.
-          'NACL_WIN64',
-        ],
-        # Need to include allocator target, but exclude tcmalloc files.
-        'use_allocator%': 'winheap',
-      }],
-
-      ['os_posix==1 and chromeos==0 and OS!="android" and OS!="ios" and embedded==0', {
-        'use_cups%': 1,
-      }, {
-        'use_cups%': 0,
-      }],
-
-      ['enable_plugins==1 and (OS=="linux" or OS=="mac" or OS=="win") and chromecast==0', {
-        'enable_pepper_cdms%': 1,
-      }, {
-        'enable_pepper_cdms%': 0,
-      }],
-
-      ['OS=="android" or chromecast==1', {
-        'enable_browser_cdms%': 1,
-      }, {
-        'enable_browser_cdms%': 0,
-      }],
-
-      # Native Client glibc toolchain is enabled except on mips
-      ['target_arch=="mipsel" or target_arch=="mips64el"', {
-        'disable_glibc%': 1,
-      }, {
-        'disable_glibc%': 0,
-      }],
-
-      # Set the relative path from this file to the GYP file of the JPEG
-      # library used by Chromium.
-      ['use_system_libjpeg==1 or use_libjpeg_turbo==0', {
-        # Configuration for using the system libjeg is here.
-        'libjpeg_gyp_path': '<(libjpeg_ijg_gyp_path)',
-      }, {
-        'libjpeg_gyp_path': '<(libjpeg_turbo_gyp_path)',
-      }],
-
-      # Options controlling the use of GConf (the classic GNOME configuration
-      # system) and GIO, which contains GSettings (the new GNOME config system).
-      ['chromeos==1 or embedded==1', {
-        'use_gconf%': 0,
-        'use_gio%': 0,
-      }, {
-        'use_gconf%': 1,
-        'use_gio%': 1,
-      }],
-
-      # Set up -D and -E flags passed into grit.
-      ['branding=="Chrome"', {
-        # TODO(mmoss) The .grd files look for _google_chrome, but for
-        # consistency they should look for google_chrome_build like C++.
-        'grit_defines': ['-D', '_google_chrome',
-                         '-E', 'CHROMIUM_BUILD=google_chrome'],
-      }, {
-        'grit_defines': ['-D', '_chromium',
-                         '-E', 'CHROMIUM_BUILD=chromium'],
-      }],
-      ['chromeos==1', {
-        'grit_defines': ['-D', 'chromeos', '-D', 'scale_factors=2x'],
-      }],
-      ['desktop_linux==1', {
-        'grit_defines': ['-D', 'desktop_linux'],
-      }],
-      ['toolkit_views==1', {
-        'grit_defines': ['-D', 'toolkit_views'],
-      }],
-      ['use_aura==1', {
-        'grit_defines': ['-D', 'use_aura'],
-      }],
-      ['use_ash==1', {
-        'grit_defines': ['-D', 'use_ash'],
-      }],
-      ['use_nss_certs==1', {
-        'grit_defines': ['-D', 'use_nss_certs'],
-      }],
-      ['use_ozone==1', {
-        'grit_defines': ['-D', 'use_ozone'],
-      }],
-      ['image_loader_extension==1', {
-        'grit_defines': ['-D', 'image_loader_extension'],
-      }],
-      ['use_titlecase_in_grd==1', {
-        'grit_defines': ['-D', 'use_titlecase'],
-      }],
-      ['OS=="android"', {
-        'grit_defines': [
-          '-t', 'android',
-          '-E', 'ANDROID_JAVA_TAGGED_ONLY=true',
-          '--no-output-all-resource-defines',
-        ],
-      }],
-      ['OS=="mac" or OS=="ios"', {
-        'grit_defines': ['-D', 'scale_factors=2x'],
-      }],
-      ['OS == "ios"', {
-        'variables': {
-          'enable_coverage%': 0,
-        },
-        'grit_defines': [
-          '-t', 'ios',
-          '--no-output-all-resource-defines',
-        ],
-
-        # Enable host builds.
-        'host_os%': "mac",
-
-        'conditions': [
-          # Use the version of clang shipped with Xcode when building official
-          # version of Chrome for iOS.
-          #
-          # TODO(eugenebut): Remove enable_coverage check once
-          # libclang_rt.profile_ios.a is bundled with Chromium's clang.
-          # http://crbug.com/450379
-          ['buildtype=="Official" or enable_coverage', {
-            'clang_xcode%': 1,
-          }],
-        ],
-      }],
-      ['enable_extensions==1', {
-        'grit_defines': ['-D', 'enable_extensions'],
-      }],
-      ['enable_plugins!=0', {
-        'grit_defines': ['-D', 'enable_plugins'],
-      }],
-      ['enable_basic_printing==1 or enable_print_preview==1', {
-        'grit_defines': ['-D', 'enable_printing'],
-      }],
-      ['enable_print_preview==1', {
-        'grit_defines': ['-D', 'enable_print_preview'],
-      }],
-      ['enable_themes==1', {
-        'grit_defines': ['-D', 'enable_themes'],
-      }],
-      ['enable_app_list==1', {
-        'grit_defines': ['-D', 'enable_app_list'],
-      }],
-      ['use_concatenated_impulse_responses==1', {
-        'grit_defines': ['-D', 'use_concatenated_impulse_responses'],
-      }],
-      ['enable_media_router==1', {
-        'grit_defines': ['-D', 'enable_media_router'],
-      }],
-      ['enable_webrtc==1', {
-        'grit_defines': ['-D', 'enable_webrtc'],
-      }],
-      ['enable_hangout_services_extension==1', {
-        'grit_defines': ['-D', 'enable_hangout_services_extension'],
-      }],
-      ['enable_task_manager==1', {
-        'grit_defines': ['-D', 'enable_task_manager'],
-      }],
-      ['notifications==1', {
-        'grit_defines': ['-D', 'enable_notifications'],
-      }],
-      ['mac_views_browser==1', {
-        'grit_defines': ['-D', 'mac_views_browser'],
-      }],
-      ['enable_resource_whitelist_generation==1 and OS!="win"', {
-        'grit_rc_header_format': ['-h', '#define {textual_id} _Pragma("whitelisted_resource_{numeric_id}") {numeric_id}'],
-      }],
-      ['enable_resource_whitelist_generation==1 and OS=="win"', {
-        'grit_rc_header_format': ['-h', '#define {textual_id} __pragma(message("whitelisted_resource_{numeric_id}")) {numeric_id}'],
-      }],
-      ['enable_mdns==1 or OS=="mac"', {
-        'grit_defines': ['-D', 'enable_service_discovery'],
-        'enable_service_discovery%': 1
-      }],
-      ['clang_use_chrome_plugins==1', {
-        'variables': {
-          'conditions': [
-            ['OS!="win"', {
-              'variables': {
-                'conditions': [
-                  ['OS=="mac" or OS=="ios"', {
-                    'clang_lib_path%': '<!(cd <(DEPTH) && pwd -P)/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib',
-                  }, { # OS != "mac" or OS != "ios"
-                    'clang_lib_path%': '<!(cd <(DEPTH) && pwd -P)/third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so',
-                  }],
-                ],
-              },
-              'clang_dynlib_flags%': '-Xclang -load -Xclang <(clang_lib_path) ',
-            }, { # OS == "win"
-              # On Windows, the plugin is built directly into clang, so there's
-              # no need to load it dynamically.
-              'clang_dynlib_flags%': '',
-            }],
-            ['(OS=="android" or OS=="linux") and chromecast==0', {
-              'clang_plugin_check_ipc_arg': '-Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc',
-            }, {
-              'clang_plugin_check_ipc_arg': '',
-            }],
-          ],
-          'clang_plugin_args%': '-Xclang -plugin-arg-find-bad-constructs -Xclang check-templates '
-          '-Xclang -plugin-arg-find-bad-constructs -Xclang follow-macro-expansion ',
-        },
-        # If you change these, also change build/config/clang/BUILD.gn.
-        'clang_chrome_plugins_flags%':
-          '<(clang_dynlib_flags)'
-          '-Xclang -add-plugin -Xclang find-bad-constructs <(clang_plugin_args) <(clang_plugin_check_ipc_arg)',
-      }],
-      ['asan==1 or msan==1 or lsan==1 or tsan==1', {
-        'clang%': 1,
-        'use_allocator%': 'none',
-        'use_sanitizer_options%': 1,
-      }],
-      ['(OS=="linux" or OS=="android") and asan==0 and msan==0 and lsan==0 and tsan==0 and build_for_tool==""', {
-        'use_experimental_allocator_shim%': 1,
-      }],
-      ['OS=="linux" and asan==0 and msan==0 and lsan==0 and tsan==0', {
-        # PNaCl toolchain Non-SFI build only supports linux OS build.
-        # Also, it does not support sanitizers.
-        'enable_nacl_nonsfi_test%': 1,
-      }],
-      ['asan==1 and OS=="linux" and chromeos==0', {
-        'use_custom_libcxx%': 1,
-      }],
-      ['ubsan==1', {
-        'clang%': 1,
-      }],
-      ['ubsan_security==1', {
-        'clang%': 1,
-      }],
-      ['ubsan_vptr==1', {
-        'clang%': 1,
-      }],
-      ['asan==1 and OS=="mac"', {
-        'mac_strip_release': 1,
-      }],
-      ['tsan==1', {
-        'use_custom_libcxx%': 1,
-      }],
-      ['msan==1', {
-        # Use a just-built, MSan-instrumented libc++ instead of the system-wide
-        # libstdc++. This is required to avoid false positive reports whenever
-        # the C++ standard library is used.
-        'use_custom_libcxx%': 1,
-        # Running the V8-generated code on an ARM simulator is a powerful hack
-        # that allows the tool to see the memory accesses from JITted code.
-        # Without this flag, JS code causes false positive reports from MSan.
-        'v8_target_arch': 'arm64',
-      }],
-
-      # Build tweaks for DrMemory.
-      # TODO(rnk): Combine with tsan config to share the builder.
-      # http://crbug.com/108155
-      ['build_for_tool=="drmemory"', {
-        # These runtime checks force initialization of stack vars which blocks
-        # DrMemory's uninit detection.
-        'win_debug_RuntimeChecks': '0',
-        # Iterator debugging is slow.
-        'win_debug_disable_iterator_debugging': '1',
-        # Try to disable optimizations that mess up stacks in a release build.
-        # DrM-i#1054 (https://github.com/DynamoRIO/drmemory/issues/1054)
-        # /O2 and /Ob0 (disable inline) cannot be used together because of a
-        # compiler bug, so we use /Ob1 instead.
-        'win_release_InlineFunctionExpansion': '1',
-        'win_release_OmitFramePointers': '0',
-        # Ditto for debug, to support bumping win_debug_Optimization.
-        'win_debug_InlineFunctionExpansion': 0,
-        'win_debug_OmitFramePointers': 0,
-        # Keep the code under #ifndef NVALGRIND.
-        'release_valgrind_build': 1,
-      }],
-
-      # RLZ library is used on Win, Mac, iOS and ChromeOS.
-      ['OS=="win" or OS=="mac" or OS=="ios" or chromeos==1', {
-        'enable_rlz_support%': 1,
-        'conditions': [
-          # RLZ is enabled for "Chrome" builds.
-          ['branding=="Chrome"', {
-            'enable_rlz%': 1,
-          }],
-        ],
-      }],
-
-      # Set default compiler flags depending on ARM version.
-      ['arm_version==6', {
-        'arm_arch%': 'armv6',
-        'arm_tune%': '',
-        'arm_fpu%': 'vfp',
-        'arm_float_abi%': 'softfp',
-        'arm_thumb%': 0,
-      }],
-      ['arm_version==7', {
-        'arm_arch%': 'armv7-a',
-        'arm_tune%': 'generic-armv7-a',
-        'conditions': [
-          ['arm_neon==1', {
-            'arm_fpu%': 'neon',
-          }, {
-            'arm_fpu%': 'vfpv3-d16',
-          }],
-          ['OS=="android"', {
-            'arm_float_abi%': 'softfp',
-          }, {
-            'arm_float_abi%': 'hard',
-          }],
-        ],
-        'arm_thumb%': 1,
-      }],
-
-      # Set default compiler flags for MIPS floating-point support.
-      ['target_arch=="mipsel"', {
-        'mips_float_abi%': 'hard',
-      }],
-      ['target_arch=="mipsel" and mips_arch_variant=="r2"', {
-        'mips_fpu_mode%': 'fp32',
-      }, {
-        'mips_fpu_mode%': '',
-      }],
-
-      # Enable brlapi by default for chromeos.
-      ['chromeos==1', {
-        'use_brlapi%': 1,
-      }],
-
-      ['use_ozone==1 and ozone_auto_platforms==1', {
-        # Use headless as the default platform.
-        'ozone_platform%': 'headless',
-        'ozone_platform_headless%': 1,
-        'conditions': [
-          ['chromecast==1', {
-            'ozone_platform_cast%': 1,
-            'conditions': [
-              # For desktop non-audio Chromecast builds, run with
-              # --ozone-platform=x11
-              # TODO(slan|halliwell): Make the default platform "cast" on
-              # desktop non-audio builds too.
-              ['is_cast_desktop_build==1 and disable_display==0', {
-                # Use GN instead. 
-              }, {
-                'ozone_platform%': 'cast',
-              }],
-            ],
-          }, {  # chromecast!=1
-            # Build all platforms whose deps are in install-build-deps.sh.
-            # Only these platforms will be compile tested by buildbots.
-            'conditions': [
-              ['chromeos==1', {
-                'ozone_platform_gbm%': 1,
-              }],
-            ],
-          }],
-        ],
-      }],
-
-      ['desktop_linux==1 and use_aura==1 and use_x11==1', {
-        'use_clipboard_aurax11%': 1,
-      }],
-
-      ['OS=="win" and use_goma==1', {
-        # goma doesn't support pch yet.
-        'chromium_win_pch': 0,
-        # goma doesn't support PDB yet, so win_z7=1 or fastbuild=1.
-        'conditions': [
-          ['win_z7==0 and fastbuild==0', {
-            'fastbuild': 1,
-          }],
-        ],
-      }],
-
-      ['host_clang==1', {
-        'host_cc': '<(make_clang_dir)/bin/clang',
-        'host_cxx': '<(make_clang_dir)/bin/clang++',
-      }, {
-        'host_cc': '<!(which gcc)',
-        'host_cxx': '<!(which g++)',
-      }],
-
-      # The seccomp-bpf sandbox is only supported on five architectures
-      # currently.
-      # Do not disable seccomp_bpf anywhere without talking to
-      # security@chromium.org!
-      ['((OS=="linux" or OS=="android") and '
-           '(target_arch=="ia32" or target_arch=="x64" or '
-             'target_arch=="arm" or target_arch=="mipsel" or '
-             'target_arch=="arm64"))', {
-         'use_seccomp_bpf%': 1,
-      }, {
-         'use_seccomp_bpf%': 0,
-      }],
-
-      ['cfi_vptr==1', {
-        'use_lto%': 1,
-      }],
-
-      ['branding=="Chrome" and buildtype=="Official"', {
-        'enable_hangout_services_extension%': 1,
-      }, {
-        'enable_hangout_services_extension%': 0,
-      }],
-    ],
-
-    # The path to the ANGLE library.
-    'angle_path': '<(DEPTH)/third_party/angle',
-
-    # List of default apps to install in new profiles.  The first list contains
-    # the source files as found in svn.  The second list, used only for linux,
-    # contains the destination location for each of the files.  When a crx
-    # is added or removed from the list, the chrome/browser/resources/
-    # default_apps/external_extensions.json file must also be updated.
-    #
-    # README: GN version of these is in the target //chrome:default_apps
-    # (there's no global variable like in GYP). Be sure to update that target
-    # if you change these lists!
-    'default_apps_list': [
-      'browser/resources/default_apps/external_extensions.json',
-      'browser/resources/default_apps/gmail.crx',
-      'browser/resources/default_apps/youtube.crx',
-      'browser/resources/default_apps/drive.crx',
-      'browser/resources/default_apps/docs.crx',
-    ],
-    'default_apps_list_linux_dest': [
-      '<(PRODUCT_DIR)/default_apps/external_extensions.json',
-      '<(PRODUCT_DIR)/default_apps/gmail.crx',
-      '<(PRODUCT_DIR)/default_apps/youtube.crx',
-      '<(PRODUCT_DIR)/default_apps/drive.crx',
-      '<(PRODUCT_DIR)/default_apps/docs.crx',
-    ],
-
-    # Whether to allow building of the GPU-related isolates.
-    'archive_gpu_tests%': 0,
-
-     # Whether to allow building of chromoting related isolates.
-    'archive_chromoting_tests%': 0,
-
-    # Whether to allow building of Media Router related isolates.
-    'archive_media_router_tests%': 0,
-  },
   'target_defaults': {
-    'variables': {
-      # The condition that operates on chromium_code is in a target_conditions
-      # section, and will not have access to the default fallback value of
-      # chromium_code at the top of this file, or to the chromium_code
-      # variable placed at the root variables scope of .gyp files, because
-      # those variables are not set at target scope.  As a workaround,
-      # if chromium_code is not set at target scope, define it in target scope
-      # to contain whatever value it has during early variable expansion.
-      # That's enough to make it available during target conditional
-      # processing.
-      'chromium_code%': '<(chromium_code)',
-
-      'component%': '<(component)',
-
-      'chromecast%': '<(chromecast)',
-
-      # See http://msdn.microsoft.com/en-us/library/aa652360(VS.71).aspx
-      'win_release_Optimization%': '2', # 2 = /O2
-      'win_debug_Optimization%': '0',   # 0 = /Od
-
-      # See http://msdn.microsoft.com/en-us/library/2kxx5t2c(v=vs.80).aspx
-      # Tri-state: blank is default, 1 on, 0 off
-      'win_release_OmitFramePointers%': '0',
-      # Tri-state: blank is default, 1 on, 0 off
-      'win_debug_OmitFramePointers%': '',
-
-      # See http://msdn.microsoft.com/en-us/library/8wtf2dfz(VS.71).aspx
-      'win_debug_RuntimeChecks%': '3',    # 3 = all checks enabled, 0 = off
-
-      # See http://msdn.microsoft.com/en-us/library/47238hez(VS.71).aspx
-      'win_debug_InlineFunctionExpansion%': '',    # empty = default, 0 = off,
-      'win_release_InlineFunctionExpansion%': '2', # 1 = only __inline, 2 = max
-
-      # VS inserts quite a lot of extra checks to algorithms like
-      # std::partial_sort in Debug build which make them O(N^2)
-      # instead of O(N*logN). This is particularly slow under memory
-      # tools like ThreadSanitizer so we want it to be disablable.
-      # See http://msdn.microsoft.com/en-us/library/aa985982(v=VS.80).aspx
-      'win_debug_disable_iterator_debugging%': '0',
-
-      # An application manifest fragment to declare compatibility settings for
-      # 'executable' targets. Ignored in other target type.
-      'win_exe_compatibility_manifest%':
-          '<(DEPTH)\\build\\win\\compatibility.manifest',
-
-      'release_extra_cflags%': '',
-      'debug_extra_cflags%': '',
-
-      'release_valgrind_build%': '<(release_valgrind_build)',
-
-      # the non-qualified versions are widely assumed to be *nix-only
-      'win_release_extra_cflags%': '',
-      'win_debug_extra_cflags%': '',
-
-      # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
-      'enable_wexit_time_destructors%': '<(enable_wexit_time_destructors)',
-
-      # Only used by Windows build for now.  Can be used to build into a
-      # differet output directory, e.g., a build_dir_prefix of VS2010_ would
-      # output files in src/build/VS2010_{Debug,Release}.
-      'build_dir_prefix%': '',
-
-      # Targets are by default not nacl untrusted code.
-      'nacl_untrusted_build%': 0,
-
-      'pnacl_compile_flags': [
-        # pnacl uses the clang compiler so we need to suppress all the
-        # same warnings as we do for clang.
-        # TODO(sbc): Remove these if/when they are removed from the clang
-        # build.
-        '-Wno-unused-function',
-        '-Wno-char-subscripts',
-        '-Wno-c++11-extensions',
-        '-Wno-unnamed-type-template-args',
-      ],
-
-      # By default, Android targets have their exported JNI symbols stripped,
-      # so we test the manual JNI registration code paths that are required
-      # when using the crazy linker. To allow use of native JNI exports (lazily
-      # resolved by the JVM), targets can enable this variable, which will stop
-      # the stripping from happening. Only targets which do not need to be
-      # compatible with the crazy linker are permitted to set this.
-      'use_native_jni_exports%': 0,
-
-      'conditions': [
-        ['OS=="win" and component=="shared_library"', {
-          # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
-          'win_release_RuntimeLibrary%': '2', # 2 = /MD (nondebug DLL)
-          'win_debug_RuntimeLibrary%': '3',   # 3 = /MDd (debug DLL)
-        }, {
-          # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
-          'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
-          'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)
-        }],
-        ['OS=="ios"', {
-          # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
-          'mac_release_optimization%': 's', # Use -Os unless overridden
-          'mac_debug_optimization%': '0',   # Use -O0 unless overridden
-        }, {
-          # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
-          'mac_release_optimization%': '2', # Use -O2 unless overridden
-          'mac_debug_optimization%': '0',   # Use -O0 unless overridden
-        }],
-        ['OS=="android"', {
-          'host_os%': '<(host_os)',  # See comment above chromium_code.
-        }],
-      ],
-      'clang_warning_flags': [
-        '-Wheader-hygiene',
-
-        # TODO(thakis): Consider -Wloop-analysis (turns on
-        # -Wrange-loop-analysis too).
-
-        # Don't die on dtoa code that uses a char as an array index.
-        # This is required solely for base/third_party/dmg_fp/dtoa.cc.
-        '-Wno-char-subscripts',
-
-        # TODO(thakis): This used to be implied by -Wno-unused-function,
-        # which we no longer use. Check if it makes sense to remove
-        # this as well. http://crbug.com/316352
-        '-Wno-unneeded-internal-declaration',
-
-        # Warns on switches on enums that cover all enum values but
-        # also contain a default: branch. Chrome is full of that.
-        '-Wno-covered-switch-default',
-
-        # Warns when a const char[] is converted to bool.
-        '-Wstring-conversion',
-
-        # C++11-related flags:
-
-        # This warns on using ints as initializers for floats in
-        # initializer lists (e.g. |int a = f(); CGSize s = { a, a };|),
-        # which happens in several places in chrome code. Not sure if
-        # this is worth fixing.
-        '-Wno-c++11-narrowing',
-
-        # Clang considers the `register` keyword as deprecated, but e.g.
-        # code generated by flex (used in angle) contains that keyword.
-        # http://crbug.com/255186
-        '-Wno-deprecated-register',
-
-        # TODO(hans): Get this cleaned up, http://crbug.com/428099
-        '-Wno-inconsistent-missing-override',
-
-        # TODO(thakis): Enable this, crbug.com/507717
-        '-Wno-shift-negative-value',
-
-        # TODO(thakis): https://crbug.com/604888
-        '-Wno-undefined-var-template',
-
-        # TODO(thakis): https://crbug.com/617318
-        '-Wno-nonportable-include-path',
-      ],
-    },
-    'defines': [
-      # Don't use deprecated V8 APIs anywhere.
-      'V8_DEPRECATION_WARNINGS',
-    ],
-    'include_dirs': [
-      '<(SHARED_INTERMEDIATE_DIR)',
-    ],
-    'conditions': [
-      ['OS=="mac"', {
-        # When compiling Objective C, warns if a method is used whose
-        # availability is newer than the deployment target.
-        'xcode_settings': { 'WARNING_CFLAGS': ['-Wpartial-availability']},
-      }],
-      ['(OS=="mac" or OS=="ios") and asan==1', {
-        'dependencies': [
-          '<(DEPTH)/build/mac/asan.gyp:asan_dynamic_runtime',
-        ],
-      }],
-      ['OS=="win" and asan==1 and component=="shared_library"', {
-        'dependencies': [
-          '<(DEPTH)/build/win/asan.gyp:asan_dynamic_runtime',
-        ],
-      }],
-      ['branding=="Chrome"', {
-        'defines': ['GOOGLE_CHROME_BUILD'],
-      }, {  # else: branding!="Chrome"
-        'defines': ['CHROMIUM_BUILD'],
-      }],
-      ['OS=="mac" and component=="shared_library"', {
-        'xcode_settings': {
-          'DYLIB_INSTALL_NAME_BASE': '@rpath',
-          'LD_RUNPATH_SEARCH_PATHS': [
-            # For unbundled binaries.
-            '@loader_path/.',
-            # For bundled binaries, to get back from Binary.app/Contents/MacOS.
-            '@loader_path/../../..',
-          ],
-        },
-      }],
-      ['clang==1 or host_clang==1', {
-        # This is here so that all files get recompiled after a clang roll and
-        # when turning clang on or off.
-        # (defines are passed via the command line, and build systems rebuild
-        # things when their commandline changes). Nothing should ever read this
-        # define.
-        'defines': ['CR_CLANG_REVISION=<!(python <(DEPTH)/tools/clang/scripts/update.py --print-revision)'],
-      }],
-      ['enable_rlz==1', {
-        'defines': ['ENABLE_RLZ'],
-      }],
-      ['component=="shared_library"', {
-        'defines': ['COMPONENT_BUILD'],
-      }],
-      ['ui_compositor_image_transport==1', {
-        'defines': ['UI_COMPOSITOR_IMAGE_TRANSPORT'],
-      }],
-      ['use_aura==1', {
-        'defines': ['USE_AURA=1'],
-      }],
-      ['use_ash==1', {
-        'defines': ['USE_ASH=1'],
-      }],
-      ['use_pango==1', {
-        'defines': ['USE_PANGO=1'],
-      }],
-      ['use_cairo==1', {
-        'defines': ['USE_CAIRO=1'],
-      }],
-      ['use_cras==1', {
-        'defines': ['USE_CRAS=1'],
-      }],
-      ['use_ozone==1', {
-        'defines': ['USE_OZONE=1'],
-      }],
-      ['use_default_render_theme==1', {
-        'defines': ['USE_DEFAULT_RENDER_THEME=1'],
-      }],
-      ['use_libjpeg_turbo==1', {
-        'defines': ['USE_LIBJPEG_TURBO=1'],
-      }],
-      ['use_x11==1', {
-        'defines': ['USE_X11=1'],
-      }],
-      ['use_clipboard_aurax11==1', {
-        'defines': ['USE_CLIPBOARD_AURAX11=1'],
-      }],
-      ['image_loader_extension==1', {
-        'defines': ['IMAGE_LOADER_EXTENSION=1'],
-      }],
-      ['enable_webrtc==1', {
-        'defines': ['ENABLE_WEBRTC=1'],
-      }],
-      ['enable_media_router==1', {
-        'defines': ['ENABLE_MEDIA_ROUTER=1'],
-      }],
-      ['proprietary_codecs==1', {
-        'defines': ['USE_PROPRIETARY_CODECS'],
-      }],
-      ['enable_viewport==1', {
-        'defines': ['ENABLE_VIEWPORT'],
-      }],
-      ['enable_pepper_cdms==1', {
-        'defines': ['ENABLE_PEPPER_CDMS'],
-      }],
-      ['enable_browser_cdms==1', {
-        'defines': ['ENABLE_BROWSER_CDMS'],
-      }],
-      ['notifications==1', {
-        'defines': ['ENABLE_NOTIFICATIONS'],
-      }],
-      ['enable_wayland_server==1', {
-        'defines': ['ENABLE_WAYLAND_SERVER=1'],
-      }],
-      ['enable_wifi_display==1', {
-        'defines': ['ENABLE_WIFI_DISPLAY=1'],
-      }],
-      ['use_udev==1', {
-        'defines': ['USE_UDEV'],
-      }],
-      ['use_external_popup_menu==1', {
-        'defines': ['USE_EXTERNAL_POPUP_MENU'],
-      }],
-      ['fastbuild!=0', {
-        'xcode_settings': {
-          'GCC_GENERATE_DEBUGGING_SYMBOLS': 'NO',
-        },
-        'conditions': [
-          ['OS=="win" and fastbuild==2', {
-            # Completely disable debug information.
-            'msvs_settings': {
-              'VCLinkerTool': {
-                'GenerateDebugInformation': 'false',
-              },
-              'VCCLCompilerTool': {
-                'DebugInformationFormat': '0',
-              },
-            },
-          }],
-          ['OS=="win" and fastbuild==1', {
-            'msvs_settings': {
-              'VCLinkerTool': {
-                # This tells the linker to generate .pdbs, so that
-                # we can get meaningful stack traces.
-                'GenerateDebugInformation': 'true',
-              },
-              'VCCLCompilerTool': {
-                # No debug info to be generated by compiler.
-                'DebugInformationFormat': '0',
-              },
-            },
-          }],
-          ['(OS=="android" or OS=="linux") and fastbuild==2', {
-            'variables': { 'debug_extra_cflags': '-g0', },
-          }],
-          ['(OS=="android" or OS=="linux") and fastbuild==1', {
-            # TODO(thakis): Change this to -g1 once http://crbug.com/456947 is
-            # fixed.
-            'variables': { 'debug_extra_cflags': '-g0', },
-          }],
-          # Android builds symbols on release by default, disable them.
-          ['OS=="android" and fastbuild==2', {
-            'variables': { 'release_extra_cflags': '-g0', },
-          }],
-          ['OS=="android" and fastbuild==1', {
-            # TODO(thakis): Change this to -g1 once http://crbug.com/456947 is
-            # fixed.
-            'variables': { 'release_extra_cflags': '-g0', },
-          }],
-        ],
-      }],  # fastbuild!=0
-      ['dcheck_always_on!=0', {
-        'defines': ['DCHECK_ALWAYS_ON=1'],
-      }],  # dcheck_always_on!=0
-      ['tracing_like_official_build!=0', {
-        'defines': ['TRACING_IS_OFFICIAL_BUILD=1'],
-      }],  # tracing_like_official_build!=0
-      ['fieldtrial_testing_like_official_build==0 and branding!="Chrome"', {
-        'defines': ['FIELDTRIAL_TESTING_ENABLED'],
-      }],  # fieldtrial_testing_like_official_build==0 and branding!="Chrome"
-      ['OS=="win"', {
-        'defines': ['NO_TCMALLOC'],
-      }],
-      ['syzyasan==1', {
-        # SyzyAsan needs /PROFILE turned on to produce appropriate pdbs.
-        'msvs_settings': {
-          'VCLinkerTool': {
-            'Profile': 'true',
-          },
-        },
-        'defines': [
-            'SYZYASAN',
-            'MEMORY_TOOL_REPLACES_ALLOCATOR',
-            'MEMORY_SANITIZER_INITIAL_SIZE',
-        ],
-      }],
-      ['OS=="win"', {
-        'defines': [
-          '__STD_C',
-          '_CRT_SECURE_NO_DEPRECATE',
-          '_SCL_SECURE_NO_DEPRECATE',
-          # This define is required to pull in the new Win 10 interfaces from
-          # system headers like ShObjIdl.h.
-          'NTDDI_VERSION=0x0A000000',
-          # This is required for ATL to use XP-safe versions of its functions.
-          '_USING_V110_SDK71_',
-        ],
-        'include_dirs': [
-          '<(DEPTH)/third_party/wtl/include',
-        ],
-        'conditions': [
-          ['win_z7!=0', {
-            'msvs_settings': {
-              # Generates debug info when win_z7=1
-              # even if fastbuild=1 (that makes GenerateDebugInformation false).
-              'VCLinkerTool': {
-                'GenerateDebugInformation': 'true',
-              },
-              'VCCLCompilerTool': {
-                'DebugInformationFormat': '1',
-              }
-            }
-          }],  # win_z7!=0
-          ['win_analyze', {
-            'defines!': [
-              # This is prohibited when running /analyze.
-              '_USING_V110_SDK71_',
-            ],
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                # Set WarnAsError to false to disable this setting for most
-                # projects so that compilation continues.
-                'WarnAsError': 'false',
-                # When win_analyze is specified add the /analyze switch.
-                # Also add /WX- to force-disable WarnAsError for projects that
-                # override WarnAsError.
-                # Also, disable various noisy warnings that have low value.
-                'AdditionalOptions': [
-                  '/analyze:WX-',
-                  '/wd6011',  # Dereferencing NULL pointer
-                  '/wd6312',  # Possible infinite loop: use of the constant
-                    # EXCEPTION_CONTINUE_EXECUTION in the exception-filter
-                  '/wd6326',  # Potential comparison of constant with constant
-                  '/wd28159', # Consider using 'GetTickCount64'
-                  '/wd28204', # Inconsistent SAL annotations
-                  '/wd28251', # Inconsistent SAL annotations
-                  '/wd28252', # Inconsistent SAL annotations
-                  '/wd28253', # Inconsistent SAL annotations
-                  '/wd28196', # The precondition is not satisfied
-                  '/wd28301', # Inconsistent SAL annotations
-                  '/wd6340',  # Sign mismatch in function parameter
-                  '/wd28182', # Dereferencing NULL pointer
-                  # C6285 is ~16% of raw warnings and has low value
-                  '/wd6285',  # non-zero constant || non-zero constant
-                  # C6334 is ~80% of raw warnings and has low value
-                  '/wd6334',  # sizeof applied to an expression with an operator
-                ],
-              },
-            },
-          }],  # win_analyze
-        ],
-      }],  # OS==win
-      ['chromecast==1', {
-        'defines': [
-          'LOG_DISABLED=0',
-        ],
-      }],
-      ['enable_task_manager==1', {
-        'defines': [
-          'ENABLE_TASK_MANAGER=1',
-        ],
-      }],
-      ['enable_extensions==1', {
-        'defines': [
-          'ENABLE_EXTENSIONS=1',
-        ],
-      }],
-      ['OS=="win" and branding=="Chrome"', {
-        'defines': ['ENABLE_SWIFTSHADER'],
-      }],
-      ['enable_dart==1', {
-        'defines': ['WEBKIT_USING_DART=1'],
-      }],
-      ['enable_pdf==1', {
-        'defines': ['ENABLE_PDF=1'],
-      }],
-      ['enable_plugin_installation==1', {
-        'defines': ['ENABLE_PLUGIN_INSTALLATION=1'],
-      }],
-      ['enable_plugins==1', {
-        'defines': ['ENABLE_PLUGINS=1'],
-      }],
-      ['enable_session_service==1', {
-        'defines': ['ENABLE_SESSION_SERVICE=1'],
-      }],
-      ['enable_themes==1', {
-        'defines': ['ENABLE_THEMES=1'],
-      }],
-      ['enable_basic_printing==1 or enable_print_preview==1', {
-        # Convenience define for ENABLE_BASIC_PRINTING || ENABLE_PRINT_PREVIEW.
-        'defines': ['ENABLE_PRINTING=1'],
-      }],
-      ['enable_basic_printing==1', {
-        # Enable basic printing support and UI.
-        'defines': ['ENABLE_BASIC_PRINTING=1'],
-      }],
-      ['enable_print_preview==1', {
-        # Enable printing with print preview.
-        # Can be defined without ENABLE_BASIC_PRINTING.
-        'defines': ['ENABLE_PRINT_PREVIEW=1'],
-      }],
-      ['enable_spellcheck==1', {
-        'defines': ['ENABLE_SPELLCHECK=1'],
-      }],
-      ['use_browser_spellchecker', {
-        'defines': ['USE_BROWSER_SPELLCHECKER=1'],
-      }],
-      ['use_minikin_hyphenation', {
-        'defines': ['USE_MINIKIN_HYPHENATION=1'],
-      }],
-      ['enable_captive_portal_detection==1', {
-        'defines': ['ENABLE_CAPTIVE_PORTAL_DETECTION=1'],
-      }],
-      ['enable_app_list==1', {
-        'defines': ['ENABLE_APP_LIST=1'],
-      }],
-      ['disable_file_support==1', {
-        'defines': ['DISABLE_FILE_SUPPORT=1'],
-      }],
-      ['disable_ftp_support==1', {
-        'defines': ['DISABLE_FTP_SUPPORT=1'],
-      }],
-      ['enable_supervised_users==1', {
-        'defines': ['ENABLE_SUPERVISED_USERS=1'],
-      }],
-      ['enable_mdns==1', {
-        'defines': ['ENABLE_MDNS=1'],
-      }],
-      ['enable_service_discovery==1', {
-        'defines' : [ 'ENABLE_SERVICE_DISCOVERY=1' ],
-      }],
-      ['enable_hangout_services_extension==1', {
-        'defines': ['ENABLE_HANGOUT_SERVICES_EXTENSION=1'],
-      }],
-      ['enable_ipc_fuzzer==1', {
-        'defines': ['ENABLE_IPC_FUZZER=1'],
-      }],
-      ['v8_use_external_startup_data==1', {
-       'defines': ['V8_USE_EXTERNAL_STARTUP_DATA'],
-      }],
-      ['enable_webvr==1', {
-        'defines': ['ENABLE_WEBVR'],
-      }],
-
-      # SAFE_BROWSING_DB_LOCAL - service manages a local database.
-      # SAFE_BROWSING_DB_REMOTE - service talks via API to a database
-      # SAFE_BROWSING_CSD - enable client-side phishing detection.
-      ['safe_browsing==1', {
-        'defines': [
-          # TODO(nparker): Remove existing uses of FULL_SAFE_BROWSING
-          'FULL_SAFE_BROWSING',
-          'SAFE_BROWSING_CSD',
-          'SAFE_BROWSING_DB_LOCAL',
-        ],
-      }],
-      ['safe_browsing==2 and OS!="ios"', {
-        'defines': [
-          'SAFE_BROWSING_DB_REMOTE',
-        ],
-      }],
-    ],  # conditions for 'target_defaults'
-    'target_conditions': [
-      ['<(use_libpci)==1', {
-        'defines': ['USE_LIBPCI=1'],
-      }],
-      ['<(use_openssl_certs)==1', {
-        'defines': ['USE_OPENSSL_CERTS=1'],
-      }],
-      ['>(nacl_untrusted_build)==1', {
-        'defines': [
-          'USE_OPENSSL_CERTS=1',
-        ],
-      }],
-      ['<(use_glib)==1 and >(nacl_untrusted_build)==0', {
-        'defines': ['USE_GLIB=1'],
-      }],
-      ['<(use_nss_certs)==1 and >(nacl_untrusted_build)==0', {
-        'defines': ['USE_NSS_CERTS=1'],
-      }],
-      ['<(chromeos)==1 and >(nacl_untrusted_build)==0', {
-        'defines': ['OS_CHROMEOS=1'],
-      }],
-      ['<(asan)==1 and >(nacl_untrusted_build)==0', {
-        'defines': [
-          'ADDRESS_SANITIZER',
-          'MEMORY_TOOL_REPLACES_ALLOCATOR',
-          'MEMORY_SANITIZER_INITIAL_SIZE',
-        ],
-      }],
-      ['enable_wexit_time_destructors==1 and OS!="win"', {
-        # TODO: Enable on Windows too, http://crbug.com/404525
-        'variables': { 'clang_warning_flags': ['-Wexit-time-destructors']},
-      }],
-      ['chromium_code==0', {
-        'variables': {
-          'clang_warning_flags': [
-            # Lots of third-party libraries have unused variables. Instead of
-            # suppressing them individually, we just blanket suppress them here.
-            '-Wno-unused-variable',
-          ],
-        },
-        'conditions': [
-          [ 'os_posix==1 and OS!="mac" and OS!="ios"', {
-            # Remove -Wextra for third-party code.
-            'cflags!': [ '-Wextra' ],
-            'cflags_cc': [
-              # Don't warn about hash_map in third-party code.
-              '-Wno-deprecated',
-            ],
-          }],
-          [ 'os_posix==1 and clang!=1 and OS!="mac" and OS!="ios"', {
-            # When we don't control the compiler, don't use -Wall for
-            # third-party code either.
-            'cflags!': [ '-Wall' ],
-          }],
-          # TODO: Fix all warnings on chromeos too.
-          [ 'os_posix==1 and OS!="mac" and OS!="ios" and (clang!=1 or chromeos==1)', {
-            'cflags!': [
-              '-Werror',
-            ],
-          }],
-          [ 'OS=="win"', {
-            'defines': [
-              '_CRT_SECURE_NO_DEPRECATE',
-              '_CRT_NONSTDC_NO_WARNINGS',
-              '_CRT_NONSTDC_NO_DEPRECATE',
-              '_SCL_SECURE_NO_DEPRECATE',
-            ],
-            'msvs_disabled_warnings': [
-              # forcing value to bool 'true' or 'false' (performance warning)
-              4800,
-            ],
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                'WarningLevel': '3',
-                'WarnAsError': 'true',
-                'Detect64BitPortabilityProblems': 'false',
-              },
-            },
-            'conditions': [
-              ['buildtype=="Official"', {
-                'msvs_settings': {
-                  'VCCLCompilerTool': { 'WarnAsError': 'false' },
-                }
-              }],
-              [ 'component=="shared_library"', {
-              # TODO(darin): Unfortunately, some third_party code depends on base.
-                'msvs_disabled_warnings': [
-                  4251,  # class 'std::xx' needs to have dll-interface.
-                 ],
-              }],
-            ],
-          }],
-
-          [ 'OS=="mac" or OS=="ios"', {
-            'xcode_settings': {
-              'WARNING_CFLAGS!': ['-Wextra'],
-            },
-            'conditions': [
-              ['buildtype=="Official"', {
-                'xcode_settings': {
-                  'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',    # -Werror
-                },
-              }],
-            ],
-          }],
-          [ 'OS=="ios"', {
-            'xcode_settings': {
-              'RUN_CLANG_STATIC_ANALYZER': 'NO',
-              # Several internal ios directories generate numerous warnings for
-              # -Wobjc-missing-property-synthesis.
-              'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'NO',
-            },
-          }],
-        ],
-      }, {
-        # In Chromium code, we define __STDC_foo_MACROS in order to get the
-        # C99 macros on Mac and Linux.
-        'defines': [
-          '__STDC_CONSTANT_MACROS',
-          '__STDC_FORMAT_MACROS',
-        ],
-        'conditions': [
-          ['OS=="win"', {
-            # turn on warnings for signed/unsigned mismatch on chromium code.
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': ['/we4389'],
-              },
-            },
-          }],
-          ['OS=="win" and component=="shared_library"', {
-            'msvs_disabled_warnings': [
-              4251,  # class 'std::xx' needs to have dll-interface.
-            ],
-          }],
-        ],
-      }],
-    ],  # target_conditions for 'target_defaults'
-    'default_configuration': 'Debug',
+    'default_configuration': 'Release',
     'configurations': {
-      # VCLinkerTool LinkIncremental values below:
-      #   0 == default
-      #   1 == /INCREMENTAL:NO
-      #   2 == /INCREMENTAL
-      # Debug links incremental, Release does not.
-      #
-      # Abstract base configurations to cover common attributes.
-      #
-      'Common_Base': {
-        'abstract': 1,
-        'msvs_configuration_attributes': {
-          'OutputDirectory': '<(DEPTH)\\build\\<(build_dir_prefix)$(ConfigurationName)',
-          'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
-          'CharacterSet': '1',
-        },
-        'msvs_settings':{
-          'VCCLCompilerTool': {
-            'AdditionalOptions': [
-              '/bigobj',
-              # Tell the compiler to crash on failures. This is undocumented
-              # and unsupported but very handy.
-              '/d2FastFail',
-            ],
-          },
-          'VCLinkerTool': {
-            # Add the default import libs.
-            'AdditionalDependencies': [
-              'kernel32.lib',
-              'gdi32.lib',
-              'winspool.lib',
-              'comdlg32.lib',
-              'advapi32.lib',
-              'shell32.lib',
-              'ole32.lib',
-              'oleaut32.lib',
-              'user32.lib',
-              'uuid.lib',
-              'odbc32.lib',
-              'odbccp32.lib',
-              'delayimp.lib',
-              'credui.lib',
-            ],
-            'AdditionalOptions': [
-              # Suggested by Microsoft Devrel to avoid
-              #   LINK : fatal error LNK1248: image size (80000000) exceeds maximum allowable size (80000000)
-              # which started happening more regularly after VS2013 Update 4.
-              # Needs to be a bit lower for VS2015, or else errors out.
-              '/maxilksize:0x7ff00000',
-              # Tell the linker to crash on failures.
-              '/fastfail',
-            ],
-          },
-        },
-        'conditions': [
-          ['OS=="win" and win_fastlink==1 and MSVS_VERSION != "2013"', {
-            'msvs_settings': {
-              'VCLinkerTool': {
-                # /PROFILE is incompatible with /debug:fastlink
-                'Profile': 'false',
-                'AdditionalOptions': [
-                  # Tell VS 2015+ to create a PDB that references debug
-                  # information in .obj and .lib files instead of copying
-                  # it all.
-                  '/DEBUG:FASTLINK',
-                ],
-              },
-            },
-          }],
-          ['OS=="win" and MSVS_VERSION == "2015"', {
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  # Work around crbug.com/526851, bug in VS 2015 RTM compiler.
-                  '/Zc:sizedDealloc-',
-                  # Disable thread-safe statics to avoid overhead and because
-                  # they are disabled on other platforms. See crbug.com/587210
-                  # and -fno-threadsafe-statics.
-                  '/Zc:threadSafeInit-',
-                ],
-              },
-            },
-          }],
-        ],
-      },
-      'x86_Base': {
-        'abstract': 1,
-        'msvs_settings': {
-          'VCLinkerTool': {
-            'MinimumRequiredVersion': '5.01',  # XP.
-            'TargetMachine': '1',
-          },
-          'VCLibrarianTool': {
-            'TargetMachine': '1',
-          },
-        },
-        'msvs_configuration_platform': 'Win32',
-      },
-      'x64_Base': {
-        'abstract': 1,
-        'msvs_configuration_platform': 'x64',
-        'msvs_settings': {
-          'VCLinkerTool': {
-            # Make sure to understand http://crbug.com/361720 if you want to
-            # increase this.
-            'MinimumRequiredVersion': '5.02',  # Server 2003.
-            'TargetMachine': '17', # x86 - 64
-            'AdditionalLibraryDirectories!':
-              ['<(windows_sdk_path)/Lib/10.0.10586.0/um/x86'],
-            'AdditionalLibraryDirectories':
-              ['<(windows_sdk_path)/Lib/10.0.10586.0/um/x64'],
-            # Doesn't exist x64 SDK. Should use oleaut32 in any case.
-            'IgnoreDefaultLibraryNames': [ 'olepro32.lib' ],
-          },
-          'VCLibrarianTool': {
-            'AdditionalLibraryDirectories!':
-              ['<(windows_sdk_path)/Lib/10.0.10586.0/um/x86'],
-            'AdditionalLibraryDirectories':
-              ['<(windows_sdk_path)/Lib/10.0.10586.0/um/x64'],
-            'TargetMachine': '17', # x64
-          },
-        },
-      },
-      'Debug_Base': {
-        'abstract': 1,
-        'defines': [
-          'DYNAMIC_ANNOTATIONS_ENABLED=1',
-          'WTF_USE_DYNAMIC_ANNOTATIONS=1',
-        ],
-        'xcode_settings': {
-          'GCC_OPTIMIZATION_LEVEL': '<(mac_debug_optimization)',
-          'OTHER_CFLAGS': [
-            '<@(debug_extra_cflags)',
-          ],
-        },
-        'msvs_settings': {
-          'VCCLCompilerTool': {
-            'Optimization': '<(win_debug_Optimization)',
-            'PreprocessorDefinitions': ['_DEBUG'],
-            'BasicRuntimeChecks': '<(win_debug_RuntimeChecks)',
-            'RuntimeLibrary': '<(win_debug_RuntimeLibrary)',
-            'conditions': [
-              # According to MSVS, InlineFunctionExpansion=0 means
-              # "default inlining", not "/Ob0".
-              # Thus, we have to handle InlineFunctionExpansion==0 separately.
-              ['win_debug_InlineFunctionExpansion==0', {
-                'AdditionalOptions': ['/Ob0'],
-              }],
-              ['win_debug_InlineFunctionExpansion!=""', {
-                'InlineFunctionExpansion':
-                  '<(win_debug_InlineFunctionExpansion)',
-              }],
-              ['win_debug_disable_iterator_debugging==1', {
-                'PreprocessorDefinitions': ['_HAS_ITERATOR_DEBUGGING=0'],
-              }],
-
-              # if win_debug_OmitFramePointers is blank, leave as default
-              ['win_debug_OmitFramePointers==1', {
-                'OmitFramePointers': 'true',
-              }],
-              ['win_debug_OmitFramePointers==0', {
-                'OmitFramePointers': 'false',
-                # The above is not sufficient (http://crbug.com/106711): it
-                # simply eliminates an explicit "/Oy", but both /O2 and /Ox
-                # perform FPO regardless, so we must explicitly disable.
-                # We still want the false setting above to avoid having
-                # "/Oy /Oy-" and warnings about overriding.
-                'AdditionalOptions': ['/Oy-'],
-              }],
-            ],
-            'AdditionalOptions': [ '<@(win_debug_extra_cflags)', ],
-          },
-          'VCLinkerTool': {
-            'LinkIncremental': '<(msvs_debug_link_incremental)',
-            # ASLR makes debugging with windbg difficult because Chrome.exe and
-            # Chrome.dll share the same base name. As result, windbg will
-            # name the Chrome.dll module like chrome_<base address>, where
-            # <base address> typically changes with each launch. This in turn
-            # means that breakpoints in Chrome.dll don't stick from one launch
-            # to the next. For this reason, we turn ASLR off in debug builds.
-            # Note that this is a three-way bool, where 0 means to pick up
-            # the default setting, 1 is off and 2 is on.
-            'RandomizedBaseAddress': 1,
-          },
-          'VCResourceCompilerTool': {
-            'PreprocessorDefinitions': ['_DEBUG'],
-          },
-        },
-        'variables': {
-          'clang_warning_flags': [
-            # Allow comparing the address of references and 'this' against 0
-            # in debug builds. Technically, these can never be null in
-            # well-defined C/C++ and Clang can optimize such checks away in
-            # release builds, but they may be used in asserts in debug builds.
-            '-Wno-undefined-bool-conversion',
-            '-Wno-tautological-undefined-compare',
-          ],
-        },
-        'conditions': [
-          ['OS=="linux" or OS=="android"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '<@(debug_extra_cflags)',
-                ],
-              }],
-            ],
-          }],
-          ['OS=="linux" and target_arch!="ia32" and disable_glibcxx_debug==0', {
-            # Enable libstdc++ debugging facilities to help catch problems
-            # early, see http://crbug.com/65151 .
-            # TODO(phajdan.jr): Should we enable this for all of POSIX?
-            'defines': ['_GLIBCXX_DEBUG=1',],
-          }],
-          ['release_valgrind_build==0', {
-            'xcode_settings': {
-              'OTHER_CFLAGS': [
-                '-fstack-protector-strong',  # Implies -fstack-protector
-              ],
-            },
-          }],
-        ],
-      },
-      'Release_Base': {
-        'abstract': 1,
-        'defines': [
-          'NDEBUG',
-        ],
-        'xcode_settings': {
-          'DEAD_CODE_STRIPPING': 'YES',  # -Wl,-dead_strip
-          'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)',
-          'OTHER_CFLAGS': [ '<@(release_extra_cflags)', ],
-        },
-        'msvs_settings': {
-          'VCCLCompilerTool': {
-            'RuntimeLibrary': '<(win_release_RuntimeLibrary)',
-            'conditions': [
-              # In official builds, each target will self-select
-              # an optimization level.
-              ['buildtype!="Official"', {
-                  'Optimization': '<(win_release_Optimization)',
-                },
-              ],
-              # According to MSVS, InlineFunctionExpansion=0 means
-              # "default inlining", not "/Ob0".
-              # Thus, we have to handle InlineFunctionExpansion==0 separately.
-              ['win_release_InlineFunctionExpansion==0', {
-                'AdditionalOptions': ['/Ob0'],
-              }],
-              ['win_release_InlineFunctionExpansion!=""', {
-                'InlineFunctionExpansion':
-                  '<(win_release_InlineFunctionExpansion)',
-              }],
-
-              # if win_release_OmitFramePointers is blank, leave as default
-              ['win_release_OmitFramePointers==1', {
-                'OmitFramePointers': 'true',
-              }],
-              ['win_release_OmitFramePointers==0', {
-                'OmitFramePointers': 'false',
-                # The above is not sufficient (http://crbug.com/106711): it
-                # simply eliminates an explicit "/Oy", but both /O2 and /Ox
-                # perform FPO regardless, so we must explicitly disable.
-                # We still want the false setting above to avoid having
-                # "/Oy /Oy-" and warnings about overriding.
-                'AdditionalOptions': ['/Oy-'],
-              }],
-              ['asan==0', {
-                # Put data in separate COMDATs. This allows the linker
-                # to put bit-identical constants at the same address even if
-                # they're unrelated constants, which saves binary size.
-                # This optimization can't be used when ASan is enabled because
-                # it is not compatible with the ASan ODR checker.
-                'AdditionalOptions': ['/Gw'],
-              }],
-            ],
-            'AdditionalOptions': [
-                '/d2Zi+',  # Improve debugging of Release builds.
-                '/Zc:inline',  # Remove unreferenced COMDAT (faster links).
-                '<@(win_release_extra_cflags)',
-            ],
-          },
-          'VCLinkerTool': {
-            # LinkIncremental is a tri-state boolean, where 0 means default
-            # (i.e., inherit from parent solution), 1 means false, and
-            # 2 means true.
-            'LinkIncremental': '1',
-            # This corresponds to the /PROFILE flag which ensures the PDB
-            # file contains FIXUP information (growing the PDB file by about
-            # 5%) but does not otherwise alter the output binary. This
-            # information is used by the Syzygy optimization tool when
-            # decomposing the release image.
-            'Profile': 'true',
-          },
-        },
-        'conditions': [
-          ['release_valgrind_build==0 and tsan==0', {
-            'defines': [
-              'NVALGRIND',
-              'DYNAMIC_ANNOTATIONS_ENABLED=0',
-            ],
-          }, {
-            'defines': [
-              'MEMORY_TOOL_REPLACES_ALLOCATOR',
-              'MEMORY_SANITIZER_INITIAL_SIZE',
-              'DYNAMIC_ANNOTATIONS_ENABLED=1',
-              'WTF_USE_DYNAMIC_ANNOTATIONS=1',
-            ],
-          }],
-          ['OS=="win" and win_use_allocator_shim==1', {
-            'defines': [
-              'ALLOCATOR_SHIM'
-            ],
-          }],
-          # _FORTIFY_SOURCE isn't really supported by Clang now, see
-          # http://llvm.org/bugs/show_bug.cgi?id=16821.
-          # It seems to work fine with Ubuntu 12 headers though, so use it
-          # in official builds.
-          ['os_posix==1 and (asan!=1 and msan!=1 and tsan!=1 and lsan!=1 and ubsan!=1) and (OS!="linux" or clang!=1 or buildtype=="Official")', {
-            'target_conditions': [
-              ['chromium_code==1', {
-                # Non-chromium code is not guaranteed to compile cleanly
-                # with _FORTIFY_SOURCE. Also, fortified build may fail
-                # when optimizations are disabled, so only do that for Release
-                # build.
-                'defines': [
-                  '_FORTIFY_SOURCE=2',
-                ],
-              }],
-            ],
-          }],
-          ['OS=="linux" or OS=="android"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '<@(release_extra_cflags)',
-                ],
-                'conditions': [
-                  ['enable_resource_whitelist_generation==1', {
-                    'cflags': [
-                      '-Wunknown-pragmas -Wno-error=unknown-pragmas',
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['OS=="ios"', {
-            'defines': [
-              'NS_BLOCK_ASSERTIONS=1',
-            ],
-          }],
-        ],
-      },
-      #
-      # Concrete configurations
-      #
-      'Debug': {
-        'inherit_from': ['Common_Base', 'x86_Base', 'Debug_Base'],
-      },
-      'Release': {
-        'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
-      },
-      'conditions': [
-        [ 'OS=="ios"', {
-          'Profile': {
-            'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
-            'target_conditions': [
-              [ '_type=="executable"', {
-                # To get a real .dSYM bundle produced by dsymutil, set the
-                # debug information format to dwarf-with-dsym.  Since
-                # strip_from_xcode will not be used, set Xcode to do the
-                # stripping as well.
-                'xcode_settings': {
-                  'DEBUG_INFORMATION_FORMAT': 'dwarf-with-dsym',
-                  'DEPLOYMENT_POSTPROCESSING': 'YES',
-                  'STRIP_INSTALLED_PRODUCT': 'YES',
-                },
-              }],
-            ],
-          },
-        }],
-        [ 'OS=="win"', {
-          # TODO(bradnelson): add a gyp mechanism to make this more graceful.
-          'Debug_x64': {
-            'inherit_from': ['Common_Base', 'x64_Base', 'Debug_Base'],
-          },
-          'Release_x64': {
-            'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base'],
-          },
-        }],
-      ],
+      'Release': {},
     },
   },
-  'conditions': [
-    ['os_posix==1', {
-      'target_defaults': {
-        'ldflags': [
-          '-Wl,-z,now',
-          '-Wl,-z,relro',
-        ],
-        # TODO(glider): enable the default options on other systems.
-        'conditions': [
-          ['use_sanitizer_options==1 and ((OS=="linux" and (chromeos==0 or target_arch!="ia32")) or OS=="mac")', {
-            'dependencies': [
-              '<(DEPTH)/build/sanitizers/sanitizers.gyp:sanitizer_options',
-            ],
-          }],
-        ],
-      },
-    }],
-    # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
-    ['os_posix==1 and disable_fatal_linker_warnings==0 and use_evdev_gestures==0 and (chromeos==0 or target_arch!="arm")', {
-      'target_defaults': {
-        'ldflags': [
-          '-Wl,--fatal-warnings',
-        ],
-      },
-    }],
-    # -Wl,-z,-defs doesn't work with the sanitiziers, http://crbug.com/452065
-    ['(OS=="linux" or OS=="android") and asan==0 and msan==0 and tsan==0 and ubsan==0 and ubsan_security==0 and ubsan_vptr==0 and cfi_diag==0', {
-      'target_defaults': {
-        'ldflags': [
-          '-Wl,-z,defs',
-        ],
-      },
-    }],
-    ['os_posix==1 and chromeos==0', {
-      # Chrome OS enables -fstack-protector-strong via its build wrapper,
-      # and we want to avoid overriding this, so stack-protector is only
-      # enabled when not building on Chrome OS.
-      # TODO(phajdan.jr): Use -fstack-protector-strong when our gcc
-      # supports it.  See also https://crbug.com/533294
-      'target_defaults': {
-        'cflags': [
-          '-fstack-protector',
-          '--param=ssp-buffer-size=4',
-        ],
-      },
-    }],
-    ['os_posix==1 and OS=="linux"', {
-      'defines': [
-        '_LARGEFILE_SOURCE',
-        '_LARGEFILE64_SOURCE',
-        '_FILE_OFFSET_BITS=64',
-      ],
-    }],
-    ['os_posix==1 and OS!="mac" and OS!="ios"', {
-      'target_defaults': {
-        # Enable -Werror by default, but put it in a variable so it can
-        # be disabled in ~/.gyp/include.gypi on the valgrind builders.
-        'variables': {
-          'werror%': '-Werror',
-          'libraries_for_target%': '',
-          'conditions' : [
-            # Enable -Wextra for chromium_code when we control the compiler.
-            ['clang==1', { 'wextra': '-Wextra' }, { 'wextra': '-Wno-extra' }],
-          ],
-        },
-        'defines': [
-          '_FILE_OFFSET_BITS=64',
-        ],
-        'cflags': [
-          '<(werror)',  # See note above about the werror variable.
-          '-pthread',
-          '-fno-strict-aliasing',  # See http://crbug.com/32204
-          '-Wall',
-          '<(wextra)',
-          # Don't warn about unused function params.  We use those everywhere.
-          '-Wno-unused-parameter',
-          # Don't warn about the "struct foo f = {0};" initialization pattern.
-          '-Wno-missing-field-initializers',
-          # Don't export any symbols (for example, to plugins we dlopen()).
-          # Note: this is *required* to make some plugins work.
-          '-fvisibility=hidden',
-          '-pipe',
-        ],
-        'cflags_cc': [
-          '-fno-exceptions',
-          '-fno-rtti',
-          # If this is removed then remove the corresponding /Zc:threadSafeInit-
-          # for Windows.
-          '-fno-threadsafe-statics',
-          # Make inline functions have hidden visiblity by default.
-          # Surprisingly, not covered by -fvisibility=hidden.
-          '-fvisibility-inlines-hidden',
-        ],
-        'ldflags': [
-          '-pthread', '-Wl,-z,noexecstack',
-        ],
-        'libraries' : [
-          '<(libraries_for_target)',
-        ],
-        'configurations': {
-          'Debug_Base': {
-            'variables': {
-              'debug_optimize%': '0',
-            },
-            'defines': [
-              '_DEBUG',
-            ],
-            'cflags': [
-              '-O>(debug_optimize)',
-              '-g',
-            ],
-            'conditions' : [
-              ['OS=="android" and target_arch!="mipsel" and target_arch!="mips64el"', {
-                # TODO(jdduke) Re-enable on mips after resolving linking
-                # issues with libc++ (crbug.com/456380).
-                'ldflags': [
-                  # Warn in case of text relocations.
-                  '-Wl,--warn-shared-textrel',
-                ],
-              }],
-              ['OS=="android" and android_full_debug==0', {
-                # Some configurations are copied from Release_Base to reduce
-                # the binary size.
-                'variables': {
-                  'debug_optimize%': 's',
-                },
-                'cflags': [
-                  '-fdata-sections',
-                  '-ffunction-sections',
-                ],
-                'ldflags': [
-                  '-Wl,-O1',
-                  '-Wl,--as-needed',
-                ],
-              }],
-              ['OS=="android" and android_full_debug==0 and target_arch!="arm64"', {
-                # We don't omit frame pointers on arm64 since they are required
-                # to correctly unwind stackframes which contain system library
-                # function frames (crbug.com/391706).
-                'cflags': [
-                  '-fomit-frame-pointer',
-                ],
-              }],
-              ['OS=="linux" and target_arch=="ia32"', {
-                'ldflags': [
-                  '-Wl,--no-as-needed',
-                ],
-              }],
-              ['debug_unwind_tables==1', {
-                'cflags': ['-funwind-tables'],
-              }, {
-                'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
-                'defines': ['NO_UNWIND_TABLES'],
-              }],
-              ['linux_use_debug_fission==1 and linux_use_gold_flags==1 and binutils_version>=223', {
-                'cflags': ['-gsplit-dwarf'],
-              }],
-            ],
-          },
-          'Release_Base': {
-            'variables': {
-              'release_optimize%': '2',
-              # Binaries become big and gold is unable to perform GC
-              # and remove unused sections for some of test targets
-              # on 32 bit platform.
-              # (This is currently observed only in chromeos valgrind bots)
-              # The following flag is to disable --gc-sections linker
-              # option for these bots.
-              'no_gc_sections%': 0,
-
-              # TODO(bradnelson): reexamine how this is done if we change the
-              # expansion of configurations
-              'release_valgrind_build%': 0,
-            },
-            'cflags': [
-              '-O<(release_optimize)',
-              # Don't emit the GCC version ident directives, they just end up
-              # in the .comment section taking up binary size.
-              '-fno-ident',
-              # Put data and code in their own sections, so that unused symbols
-              # can be removed at link time with --gc-sections.
-              '-fdata-sections',
-              '-ffunction-sections',
-            ],
-            'ldflags': [
-              # Specifically tell the linker to perform optimizations.
-              # See http://lwn.net/Articles/192624/ .
-              '-Wl,-O1',
-              '-Wl,--as-needed',
-            ],
-            'conditions' : [
-              ['no_gc_sections==0', {
-                'ldflags': [
-                  '-Wl,--gc-sections',
-                ],
-              }],
-              ['OS=="android" and target_arch!="arm64"', {
-                # We don't omit frame pointers on arm64 since they are required
-                # to correctly unwind stackframes which contain system library
-                # function frames (crbug.com/391706).
-                'cflags': [
-                  '-fomit-frame-pointer',
-                ]
-              }],
-              ['OS=="android" and target_arch!="mipsel" and target_arch!="mips64el"', {
-                # TODO(jdduke) Re-enable on mips after resolving linking
-                # issues with libc++ (crbug.com/456380).
-                'ldflags': [
-                  # Warn in case of text relocations.
-                  '-Wl,--warn-shared-textrel',
-                ],
-              }],
-              ['OS=="android"', {
-                'variables': {
-                  'release_optimize%': 's',
-                },
-              }, {
-                'ldflags': [
-                  # TODO(pcc): Fix linker bug which requires us to link pthread
-                  # unconditionally here (crbug.com/623236).
-                  '-Wl,--no-as-needed',
-                  '-lpthread',
-                  '-Wl,--as-needed',
-                ],
-              }],
-              ['profiling==1', {
-                'cflags': [
-                  '-fno-omit-frame-pointer',
-                  '-g',
-                ],
-                'conditions' : [
-                  ['profiling_full_stack_frames==1', {
-                    'cflags': [
-                      '-fno-inline',
-                      '-fno-optimize-sibling-calls',
-                    ],
-                  }],
-                ],
-              }],
-              ['release_unwind_tables==1', {
-                'cflags': ['-funwind-tables'],
-              }, {
-                'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
-                'defines': ['NO_UNWIND_TABLES'],
-              }],
-            ],
-          },
-        },
-        'conditions': [
-          ['target_arch=="ia32"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'asflags': [
-                  # Needed so that libs with .s files (e.g. libicudata.a)
-                  # are compatible with the general 32-bit-ness.
-                  '-32',
-                ],
-                # All floating-point computations on x87 happens in 80-bit
-                # precision.  Because the C and C++ language standards allow
-                # the compiler to keep the floating-point values in higher
-                # precision than what's specified in the source and doing so
-                # is more efficient than constantly rounding up to 64-bit or
-                # 32-bit precision as specified in the source, the compiler,
-                # especially in the optimized mode, tries very hard to keep
-                # values in x87 floating-point stack (in 80-bit precision)
-                # as long as possible. This has important side effects, that
-                # the real value used in computation may change depending on
-                # how the compiler did the optimization - that is, the value
-                # kept in 80-bit is different than the value rounded down to
-                # 64-bit or 32-bit. There are possible compiler options to
-                # make this behavior consistent (e.g. -ffloat-store would keep
-                # all floating-values in the memory, thus force them to be
-                # rounded to its original precision) but they have significant
-                # runtime performance penalty.
-                #
-                # -mfpmath=sse -msse2 makes the compiler use SSE instructions
-                # which keep floating-point values in SSE registers in its
-                # native precision (32-bit for single precision, and 64-bit
-                # for double precision values). This means the floating-point
-                # value used during computation does not change depending on
-                # how the compiler optimized the code, since the value is
-                # always kept in its specified precision.
-                #
-                # Refer to http://crbug.com/348761 for rationale behind SSE2
-                # being a minimum requirement for 32-bit Linux builds and
-                # http://crbug.com/313032 for an example where this has "bit"
-                # us in the past.
-                'cflags': [
-                  '-msse2',
-                  '-mfpmath=sse',
-                  '-mmmx',  # Allows mmintrin.h for MMX intrinsics.
-                  '-m32',
-                ],
-                'ldflags': [
-                  '-m32',
-                ],
-                'conditions': [
-                  # Use gold linker for Android ia32 target.
-                  ['OS=="android"', {
-                     # Use gold linker for Android ia32 target.
-                    'ldflags': [
-                      '-fuse-ld=gold',
-                    ],
-                    # Use -mstackrealign due to a bug on ia32 Jelly Bean.
-                    # See crbug.com/521527
-                    'cflags': [
-                      '-mstackrealign',
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['target_arch=="x64"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  # Use gold linker for Android x64 target.
-                  ['OS=="android"', {
-                    'ldflags': [
-                      '-fuse-ld=gold',
-                    ],
-                  }],
-                ],
-                'cflags': [
-                  '-m64',
-                  '-march=x86-64',
-                ],
-                'ldflags': [
-                  '-m64',
-                ],
-              }],
-            ],
-          }],
-          ['target_arch=="arm"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  ['clang==0', {
-                    'cflags': [
-                      # Don't warn about "maybe" uninitialized. Clang doesn't
-                      # include this in -Wall but gcc does, and it gives false
-                      # positives.
-                      '-Wno-maybe-uninitialized',
-                    ],
-                    'cflags_cc': [
-                      # The codesourcery arm-2009q3 toolchain warns at that the ABI
-                      # has changed whenever it encounters a varargs function. This
-                      # silences those warnings, as they are not helpful and
-                      # clutter legitimate warnings.
-                      '-Wno-abi',
-                    ],
-                  }],
-                  ['clang==1 and arm_arch!="" and OS!="android"', {
-                    'cflags': [
-                      '-target arm-linux-gnueabihf',
-                    ],
-                    'ldflags': [
-                      '-target arm-linux-gnueabihf',
-                    ],
-                  }],
-                  ['arm_arch!=""', {
-                    'cflags': [
-                      '-march=<(arm_arch)',
-                    ],
-                    'conditions': [
-                      ['use_lto==1 or use_lto_o2==1', {
-                        'ldflags': [
-                          '-march=<(arm_arch)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['arm_tune!=""', {
-                    'cflags': [
-                      '-mtune=<(arm_tune)',
-                    ],
-                    'conditions': [
-                      ['use_lto==1 or use_lto_o2==1', {
-                        'ldflags': [
-                          '-mtune=<(arm_tune)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['arm_fpu!=""', {
-                    'cflags': [
-                      '-mfpu=<(arm_fpu)',
-                    ],
-                    'conditions': [
-                      ['use_lto==1 or use_lto_o2==1', {
-                        'ldflags': [
-                          '-mfpu=<(arm_fpu)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['arm_float_abi!=""', {
-                    'cflags': [
-                      '-mfloat-abi=<(arm_float_abi)',
-                    ],
-                    'conditions': [
-                      ['use_lto==1 or use_lto_o2==1', {
-                        'ldflags': [
-                          '-mfloat-abi=<(arm_float_abi)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['arm_thumb==1', {
-                    'cflags': [
-                      '-mthumb',
-                    ],
-                    'conditions': [
-                      ['use_lto==1 or use_lto_o2==1', {
-                        'ldflags': [
-                          '-mthumb',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['OS=="android"', {
-                    # Most of the following flags are derived from what Android
-                    # uses by default when building for arm, reference for which
-                    # can be found in the following file in the Android NDK:
-                    # toolchains/arm-linux-androideabi-4.9/setup.mk
-                    'cflags': [
-                      # The tree-sra optimization (scalar replacement for
-                      # aggregates enabling subsequent optimizations) leads to
-                      # invalid code generation when using the Android NDK's
-                      # compiler (r5-r7). This can be verified using
-                      # webkit_unit_tests' WTF.Checked_int8_t test.
-                      '-fno-tree-sra',
-                      # The following option is disabled to improve binary
-                      # size and performance in gcc 4.9.
-                      '-fno-caller-saves',
-                      '-Wno-psabi',
-                    ],
-                    # Android now supports .relro sections properly.
-                    # NOTE: While these flags enable the generation of .relro
-                    # sections, the generated libraries can still be loaded on
-                    # older Android platform versions.
-                    'ldflags': [
-                        '-Wl,-z,relro',
-                        '-Wl,-z,now',
-                        '-fuse-ld=gold',
-                    ],
-                    'conditions': [
-                      ['arm_thumb==1', {
-                        'cflags': [ '-mthumb-interwork' ],
-                      }],
-                      ['profiling==1', {
-                        'cflags': [
-                          # Thumb code with frame pointer makes chrome crash
-                          # early.
-                          '-marm',
-                          '-mapcs-frame', # Required by -fno-omit-frame-pointer.
-                          # The perf report sometimes incorrectly attributes
-                          # code from tail calls.
-                          '-fno-optimize-sibling-calls',
-                        ],
-                        'cflags!': [
-                          '-fomit-frame-pointer',
-                        ],
-                      }],
-                      ['clang==1', {
-                        'cflags!': [
-                          # Clang does not support the following options.
-                          '-mapcs-frame',
-                          '-mthumb-interwork',
-                          '-finline-limit=64',
-                          '-fno-tree-sra',
-                          '-fno-caller-saves',
-                          '-Wno-psabi',
-                        ],
-                      }],
-                      ['clang==1 and linux_use_bundled_gold==0', {
-                        'ldflags': [
-                          # Let clang find the ld.gold in the NDK.
-                          '--gcc-toolchain=<(android_toolchain)/..',
-                        ],
-                      }],
-                      ['asan==1', {
-                        'cflags': [
-                          '-marm', # Required for frame pointer based stack traces.
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['chromecast==1', {
-                    'cflags': [
-                      # We set arm_arch to "" so that -march compiler option
-                      # is not set.  Otherwise a gcc bug that would complain
-                      # about it conflicting with '-mcpu=cortex-a9'. The flag
-                      # '-march=armv7-a' is actually redundant anyway because
-                      # it is enabled by default when we built the toolchain.
-                      # And using '-mcpu=cortex-a9' should be sufficient.
-                      '-mcpu=cortex-a9',
-                      '-funwind-tables',
-                      # Breakpad requires symbols with debugging information
-                      '-g',
-                    ],
-                    'ldflags': [
-                      # We want to statically link libstdc++/libgcc.
-                      '-static-libstdc++',
-                      '-static-libgcc',
-                      # Don't allow visible symbols from libraries that contain
-                      # assembly code with symbols that aren't hidden properly.
-                      # http://b/26390825
-                      '-Wl,--exclude-libs=libffmpeg.a',
-                    ],
-                    'cflags!': [
-                      # Some components in Chromium (e.g. v8, skia, ffmpeg)
-                      # define their own cflags for arm builds that could
-                      # conflict with the flags we set here (e.g.
-                      # '-mcpu=cortex-a9'). Remove these flags explicitly.
-                      '-march=armv7-a',
-                      '-mtune=cortex-a8',
-                    ],
-                    'target_conditions': [
-                      [ '_type=="executable" and OS!="android"', {
-                        # Statically link whole libstdc++ and libgcc in
-                        # executables to ensure only one copy at runtime.
-                        'ldflags': [
-                          # Note executables also get -static-stdlibc++/libgcc.
-                          # Despite including libstdc++/libgcc archives, we
-                          # still need to specify static linking for them in
-                          # order to prevent the executable from having a
-                          # dynamic dependency on them.
-
-                          # Export stdlibc++ and libgcc symbols to force shlibs
-                          # to refer to these symbols from the executable.
-                          '-Wl,--export-dynamic',
-
-                          '-lm', # stdlibc++ requires math.h
-
-                          # In case we redefined stdlibc++ symbols
-                          # (e.g. tc_malloc)
-                          '-Wl,--allow-multiple-definition',
-
-                          '-Wl,--whole-archive',
-                          '-l:libstdc++.a',
-                          '-l:libgcc.a',
-                          '-Wl,--no-whole-archive',
-                        ],
-                      }]
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['target_arch=="arm64"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  ['OS=="android"', {
-                    'cflags!': [
-                       '-fstack-protector',  # stack protector is always enabled on arm64.
-                    ],
-                  }],
-                  ['clang==1 and arm_arch!="" and OS!="android"', {
-                    'cflags': [
-                      '-target aarch64-linux-gnu',
-                     ],
-                     'ldflags': [
-                       '-target aarch64-linux-gnu',
-                     ],
-                 }],
-                ],
-              }],
-            ],
-          }],
-          ['target_arch=="mipsel"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  ['mips_arch_variant=="r6"', {
-                    'conditions': [
-                      ['clang==1', {
-                        'conditions': [
-                          ['OS=="android"', {
-                            'cflags': [ '-target mipsel-linux-android', '-march=mipsel', '-mcpu=mips32r6', ],
-                            'ldflags': [ '-target mipsel-linux-android', ],
-                          }],
-                        ],
-                      }, { # clang==0
-                        'cflags': ['-mips32r6', '-Wa,-mips32r6', ],
-                      }],
-                      ['clang==0 and OS=="android"', {
-                        'ldflags': ['-mips32r6', '-Wl,-melf32ltsmip',],
-                      }],
-                      ['mips_msa==1', {
-                        'cflags': ['-mmsa', '-mfp64', '-msched-weight', '-mload-store-pairs'],
-                      }],
-                    ],
-                    'cflags': [ '-mfp64', '-mno-odd-spreg' ],
-                    'ldflags': [ '-mfp64', '-mno-odd-spreg' ],
-                  }],
-                  ['mips_arch_variant=="r2"', {
-                    'conditions': [
-                      ['mips_float_abi=="hard" and mips_fpu_mode!=""', {
-                        'cflags': ['-m<(mips_fpu_mode)'],
-                      }],
-                      ['clang==1', {
-                         'conditions': [
-                          ['OS=="android"', {
-                            'cflags': [ '-target mipsel-linux-android', '-march=mipsel', '-mcpu=mips32r2'],
-                            'ldflags': [ '-target mipsel-linux-android', ],
-                          }, {
-                            'cflags': [ '-target mipsel-linux-gnu', '-march=mipsel', '-mcpu=mips32r2'],
-                            'ldflags': [ '-target mipsel-linux-gnu', ],
-                          }],
-                         ],
-                      }, { # clang==0
-                        'cflags': ['-mips32r2', '-Wa,-mips32r2', ],
-                      }],
-                    ],
-                  }],
-                  ['mips_arch_variant=="r1"', {
-                    'conditions': [
-                      ['clang==1', {
-                        'conditions': [
-                          ['OS=="android"', {
-                            'cflags': [ '-target mipsel-linux-android', '-march=mipsel', '-mcpu=mips32'],
-                            'ldflags': [ '-target mipsel-linux-android', ],
-                          }, {
-                            'cflags': [ '-target mipsel-linux-gnu', '-march=mipsel', '-mcpu=mips32'],
-                            'ldflags': [ '-target mipsel-linux-gnu', ],
-                          }],
-                        ],
-                      }, { # clang==0
-                        'cflags': ['-mips32', '-Wa,-mips32', ],
-                      }],
-                    ],
-                  }],
-                  ['clang==1', {
-                    'cflags!': [
-                      # Clang does not support the following options.
-                      '-finline-limit=64',
-                    ],
-                    # TODO(gordanac) Enable integrated-as.
-                    'cflags': [ '-fno-integrated-as' ],
-                    'conditions': [
-                      ['OS=="android"', {
-                        'cflags': [
-                          # Else /usr/bin/as gets picked up.
-                          '-B<(android_toolchain)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['clang==1 and OS=="android"', {
-                    'ldflags': [
-                      # Let clang find the ld in the NDK.
-                      '--gcc-toolchain=<(android_toolchain)/..',
-                    ],
-                  }],
-                  ['mips_dsp_rev==1', {
-                    'cflags': ['-mdsp'],
-                  }],
-                  ['mips_dsp_rev==2', {
-                    'cflags': ['-mdspr2'],
-                  }],
-                ],
-                'cflags': [
-                  '-m<(mips_float_abi)-float'
-                ],
-                'ldflags': [
-                  '-Wl,--no-keep-memory'
-                ],
-                'cflags_cc': [
-                  '-Wno-uninitialized',
-                ],
-              }],
-              ['_toolset=="target" and _type=="executable"', {
-                'conditions': [
-                  ['OS=="linux"', {
-                    'ldflags': ['-pie'],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['target_arch=="mips64el"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  ['mips_arch_variant=="r6"', {
-                    'conditions': [
-                      ['clang==1', {
-                        'conditions': [
-                          ['OS=="android"', {
-                            'cflags': [ '-target mips64el-linux-android', '-march=mips64el', '-mcpu=mips64r6', ],
-                            'ldflags': [ '-target mips64el-linux-android', ],
-                          }],
-                        ],
-                      }, { # clang==0
-                        'cflags': ['-mips64r6', '-Wa,-mips64r6'],
-                        'ldflags': ['-mips64r6'],
-                      }],
-                      ['mips_msa==1', {
-                        'cflags': ['-mmsa', '-mfp64', '-msched-weight', '-mload-store-pairs'],
-                      }],
-                    ],
-                  }],
-                  ['mips_arch_variant=="r2"', {
-                    'cflags': ['-mips64r2', '-Wa,-mips64r2'],
-                    'ldflags': ['-mips64r2'],
-                  }],
-                  ['clang==1', {
-                    'cflags!': [
-                      # Clang does not support the following options.
-                      '-finline-limit=64',
-                    ],
-                    # TODO(gordanac) Enable integrated-as.
-                    'cflags': [ '-fno-integrated-as' ],
-                    'conditions': [
-                      ['OS=="android"', {
-                        'cflags': [
-                          # Else /usr/bin/as gets picked up.
-                          '-B<(android_toolchain)',
-                        ],
-                      }],
-                    ],
-                  }],
-                  ['clang==1 and OS=="android"', {
-                    'ldflags': [
-                      # Let clang find the ld in the NDK.
-                      '--gcc-toolchain=<(android_toolchain)/..',
-                    ],
-                  }],
-                ],
-
-                'cflags_cc': [
-                  '-Wno-uninitialized',
-                ],
-              }],
-            ],
-          }],
-          ['linux_fpic==1', {
-            'cflags': [
-              '-fPIC',
-            ],
-            'ldflags': [
-              '-fPIC',
-            ],
-          }],
-          ['sysroot!=""', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '--sysroot=<(sysroot)',
-                ],
-                'ldflags': [
-                  '--sysroot=<(sysroot)',
-                  '<!(<(DEPTH)/build/linux/sysroot_ld_path.sh <(sysroot))',
-                ],
-              }]]
-          }],
-          ['clang==1', {
-            'cflags': [
-              # See http://crbug.com/110262
-              '-fcolor-diagnostics',
-            ],
-            'cflags_cc': [
-              # gnu++11 instead of c++11 is needed because some code uses
-              # typeof() (a GNU extension).
-              # TODO(thakis): Eventually switch this to c++11 instead,
-              # http://crbug.com/427584
-              '-std=gnu++11',
-            ],
-          }],
-          ['clang==1 and chromeos==1', {
-            'cflags': [
-              # TODO(thakis): Remove, http://crbug.com/263960
-              '-Wno-reserved-user-defined-literal',
-            ],
-          }],
-          ['clang==0 and host_clang==1', {
-            'target_conditions': [
-              ['_toolset=="host"', {
-                'cflags_cc': [ '-std=gnu++11', ],
-              }],
-            ],
-          }],
-          ['clang==1 and clang_use_chrome_plugins==1', {
-            'cflags': [
-              '<@(clang_chrome_plugins_flags)',
-            ],
-          }],
-          ['clang==1 and clang_load!=""', {
-            'cflags': [
-              '-Xclang', '-load', '-Xclang', '<(clang_load)',
-            ],
-          }],
-          ['clang==1 and clang_add_plugin!=""', {
-            'cflags': [
-              '-Xclang', '-add-plugin', '-Xclang', '<(clang_add_plugin)',
-            ],
-          }],
-          ['clang==1 and target_arch=="ia32"', {
-            'cflags': [
-              # Else building libyuv gives clang's register allocator issues,
-              # see llvm.org/PR15798 / crbug.com/233709
-              '-momit-leaf-frame-pointer',
-              # Align the stack on 16-byte boundaries, http://crbug.com/418554.
-              '-mstack-alignment=16',
-              '-mstackrealign',
-            ],
-          }],
-          # Common options for AddressSanitizer, LeakSanitizer,
-          # ThreadSanitizer, MemorySanitizer and non-official CFI builds.
-          ['asan==1 or lsan==1 or tsan==1 or msan==1 or ubsan==1 or ubsan_security==1 or ubsan_vptr==1 or '
-           '(cfi_vptr==1 and buildtype!="Official")', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fno-omit-frame-pointer',
-                  '-gline-tables-only',
-                ],
-                'cflags!': [
-                  '-fomit-frame-pointer',
-                ],
-              }],
-            ],
-          }],
-          ['asan==1 or lsan==1 or tsan==1 or msan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'ldflags!': [
-                  # Functions interposed by the sanitizers can make ld think
-                  # that some libraries aren't needed when they actually are,
-                  # http://crbug.com/234010. As workaround, disable --as-needed.
-                  '-Wl,--as-needed',
-                ],
-                'defines': [
-                  'MEMORY_TOOL_REPLACES_ALLOCATOR',
-                  'MEMORY_SANITIZER_INITIAL_SIZE',
-                ],
-              }],
-            ],
-          }],
-          ['asan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=address',
-                  # TODO(eugenis): Re-enable. http://crbug.com/427202
-                  #'-fsanitize-blacklist=<(asan_blacklist)',
-                ],
-                'ldflags': [
-                  '-fsanitize=address',
-                ],
-              }],
-            ],
-            'conditions': [
-              ['OS=="mac"', {
-                'cflags': [
-                  '-mllvm -asan-globals=0',  # http://crbug.com/352073
-                ],
-              }],
-            ],
-          }],
-          ['ubsan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  ['chromecast==0', {
-                    'cflags': [
-                      # Employ the experimental PBQP register allocator to avoid
-                      # slow compilation on files with too many basic blocks.
-                      # See http://crbug.com/426271.
-                      '-mllvm -regalloc=pbqp',
-                      # Speculatively use coalescing to slightly improve the code
-                      # generated by PBQP regallocator. May increase compile time.
-                      '-mllvm -pbqp-coalescing',
-                    ],
-                  }],
-                ],
-                'cflags': [
-                  # FIXME: work on enabling more flags and getting rid of false
-                  # positives. http://crbug.com/174801.
-                  '-fsanitize=bounds',
-                  '-fsanitize=float-divide-by-zero',
-                  '-fsanitize=integer-divide-by-zero',
-                  '-fsanitize=null',
-                  '-fsanitize=object-size',
-                  '-fsanitize=return',
-                  '-fsanitize=returns-nonnull-attribute',
-                  '-fsanitize=shift-exponent',
-                  '-fsanitize=signed-integer-overflow',
-                  '-fsanitize=unreachable',
-                  '-fsanitize=vla-bound',
-                  '-fsanitize-blacklist=<(ubsan_blacklist)',
-                ],
-                'cflags_cc!': [
-                  '-fno-rtti',
-                ],
-                'cflags!': [
-                  '-fno-rtti',
-                ],
-                'ldflags': [
-                  '-fsanitize=undefined',
-                ],
-                'defines': [
-                  'UNDEFINED_SANITIZER',
-                ],
-              }],
-            ],
-          }],
-          ['ubsan_security==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=signed-integer-overflow,shift,vptr',
-                  '-fsanitize-blacklist=<(ubsan_security_blacklist)',
-                ],
-                'cflags_cc!': [
-                  '-fno-rtti',
-                ],
-                'cflags!': [
-                  '-fno-rtti',
-                ],
-                'ldflags': [
-                  '-fsanitize=signed-integer-overflow,shift,vptr',
-                ],
-                'defines': [
-                  'UNDEFINED_SANITIZER',
-                ],
-              }],
-            ],
-          }],
-          ['ubsan_vptr==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=vptr',
-                  '-fsanitize-blacklist=<(ubsan_vptr_blacklist)',
-                ],
-                'cflags_cc!': [
-                  '-fno-rtti',
-                ],
-                'cflags!': [
-                  '-fno-rtti',
-                ],
-                'ldflags': [
-                  '-fsanitize=vptr',
-                ],
-                'defines': [
-                  'UNDEFINED_SANITIZER',
-                ],
-              }],
-            ],
-          }],
-          ['sanitizer_coverage!=""', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize-coverage=<(sanitizer_coverage)',
-                ],
-                'defines': [
-                  'SANITIZER_COVERAGE',
-                ],
-              }],
-            ],
-          }],
-          ['sanitizer_coverage!="" and target_arch=="arm"', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-mllvm -sanitizer-coverage-block-threshold=0',  # http://crbug.com/517105
-                ],
-              }],
-            ],
-          }],
-          ['asan_field_padding!=0', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize-address-field-padding=<(asan_field_padding)',
-                ],
-              }],
-            ],
-          }],
-          ['lsan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=leak',
-                ],
-                'ldflags': [
-                  '-fsanitize=leak',
-                ],
-                'defines': [
-                  'LEAK_SANITIZER',
-                  'WTF_USE_LEAK_SANITIZER=1',
-                ],
-              }],
-            ],
-          }],
-          ['tsan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=thread',
-                  '-fsanitize-blacklist=<(tsan_blacklist)',
-                ],
-                'ldflags': [
-                  '-fsanitize=thread',
-                ],
-                'defines': [
-                  'THREAD_SANITIZER',
-                  'DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL=1',
-                  'WTF_USE_DYNAMIC_ANNOTATIONS_NOIMPL=1',
-                ],
-              }],
-            ],
-          }],
-          ['msan==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize=memory',
-                  '-fsanitize-memory-track-origins=<(msan_track_origins)',
-                  '-fsanitize-blacklist=<(msan_blacklist)',
-                ],
-                'ldflags': [
-                  '-fsanitize=memory',
-                ],
-                'defines': [
-                  'MEMORY_SANITIZER',
-                ],
-              }],
-            ],
-          }],
-          ['use_instrumented_libraries==1', {
-            'dependencies': [
-              '<(DEPTH)/third_party/instrumented_libraries/instrumented_libraries.gyp:instrumented_libraries',
-            ],
-          }],
-          ['use_prebuilt_instrumented_libraries==1', {
-            'dependencies': [
-              '<(DEPTH)/third_party/instrumented_libraries/instrumented_libraries.gyp:prebuilt_instrumented_libraries',
-            ],
-          }],
-          ['use_custom_libcxx==1', {
-            'dependencies': [
-              '<(DEPTH)/buildtools/third_party/libc++/libc++.gyp:libcxx_proxy',
-            ],
-          }],
-          ['order_profiling!=0 and OS=="android"', {
-            'target_conditions' : [
-              ['_toolset=="target"', {
-                'cflags': ['-finstrument-functions'],
-                'defines': ['CYGPROFILE_INSTRUMENTATION'],
-              }],
-            ],
-          }],
-          # Clang doesn't understand -finstrument-functions-exclude-file-list=.
-          ['order_profiling!=0 and OS=="android" and clang==0', {
-            'target_conditions' : [
-              ['_toolset=="target"', {
-                'cflags': [
-                  # Allow mmx intrinsics to inline, so that the
-                  # compiler can expand the intrinsics.
-                  '-finstrument-functions-exclude-file-list=mmintrin.h',
-                  # Avoids errors with current NDK:
-                  # "third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/include/arm_neon.h:3426:3: error: argument must be a constant"
-                  '-finstrument-functions-exclude-file-list=arm_neon.h',
-                ],
-              }],
-            ],
-          }],
-          ['linux_dump_symbols==1', {
-            'cflags': [ '-g' ],
-            'conditions': [
-              ['OS=="linux" and host_arch=="ia32" and linux_use_bundled_gold==0', {
-                'target_conditions': [
-                  ['_toolset=="target"', {
-                    'ldflags': [
-                      # Attempt to use less memory to prevent the linker from
-                      # running out of address space. Considering installing a
-                      # 64-bit kernel and switching to a 64-bit linker.
-                      '-Wl,--no-keep-memory',
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['use_allocator!="tcmalloc"', {
-            'defines': ['NO_TCMALLOC'],
-          }],
-          ['linux_use_gold_flags==1', {
-            # Newer gccs and clangs support -fuse-ld, use the flag to force gold
-            # selection.
-            # gcc -- http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Optimize-Options.html
-            'ldflags': [ '-fuse-ld=gold', ],
-
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'conditions': [
-                  # TODO(thestig): Enable this for disabled cases.
-                  [ 'linux_use_bundled_binutils==1', {
-                    'ldflags': [
-                      # Experimentation found that using four linking threads
-                      # saved ~20% of link time.
-                      # https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
-                      # Only apply this to the target linker, since the host
-                      # linker might not be gold, but isn't used much anyway.
-                      '-Wl,--threads',
-                      '-Wl,--thread-count=4',
-                    ],
-                  }],
-                  # TODO(thestig): Enable this for disabled cases.
-                  [ 'buildtype!="Official" and chromeos==0 and release_valgrind_build==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan==0 and ubsan_security==0 and ubsan_vptr==0', {
-                    'ldflags': [
-                      '-Wl,--detect-odr-violations',
-                    ],
-                  }],
-                ],
-              }],
-            ],
-            'conditions': [
-              ['release_valgrind_build==0 and order_profiling==0 and asan==0 and msan==0 and lsan==0 and tsan==0', {
-                'target_conditions': [
-                  ['_toolset=="target"', {
-                    'ldflags': [
-                      '-Wl,--icf=<(gold_icf_level)',
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['linux_use_bundled_binutils==1', {
-            'cflags': [
-              '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
-            ],
-          }],
-          ['linux_use_bundled_gold==1 and '
-           'not (clang==0 and (use_lto==1 or use_lto_o2==1))', {
-            # Put our binutils, which contains gold in the search path. We pass
-            # the path to gold to the compiler. gyp leaves unspecified what the
-            # cwd is when running the compiler, so the normal gyp path-munging
-            # fails us. This hack gets the right path.
-            #
-            # Disabled when using GCC LTO because GCC also uses the -B search
-            # path at link time to find "as", and our bundled "as" can only
-            # target x86.
-            'ldflags': [
-              '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
-            ],
-          }],
-          # Some binutils 2.23 releases may or may not have new dtags enabled,
-          # but they are all compatible with --disable-new-dtags,
-          # because the new dynamic tags are not created by default.
-          ['binutils_version>=223', {
-            # Newer binutils don't set DT_RPATH unless you disable "new" dtags
-            # and the new DT_RUNPATH doesn't work without --no-as-needed flag.
-            # FIXME(mithro): Figure out the --as-needed/--no-as-needed flags
-            # inside this file to allow usage of --no-as-needed and removal of
-            # this flag.
-            'ldflags': [
-              '-Wl,--disable-new-dtags',
-            ],
-          }],
-          ['clang==0', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags_cc': [
-                  '-std=gnu++11',
-                  # See comment for -Wno-c++11-narrowing.
-                  '-Wno-narrowing',
-                ],
-              }],
-            ],
-          }],
-          ['clang==0 and host_clang==0', {
-            'target_conditions': [
-              ['_toolset=="host"', {
-                'cflags_cc': [
-                  '-std=gnu++11',
-                  # See comment for -Wno-c++11-narrowing.
-                  '-Wno-narrowing',
-                ],
-              }],
-            ],
-          }],
-          ['clang==0 and chromeos==1', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags_cc': [
-                  # TODO(thakis): Remove, http://crbug.com/263960
-                  '-Wno-literal-suffix',
-                ],
-              }],
-            ],
-          }],
-          ['clang==0 and host_clang==0 and chromeos==1', {
-            'target_conditions': [
-              ['_toolset=="host"', {
-                'cflags_cc': [
-                  # TODO(thakis): Remove, http://crbug.com/263960
-                  '-Wno-literal-suffix',
-                ],
-              }],
-            ],
-          }],
-        ],
-      },
-    }],
-    # *BSD-specific options; note that most *BSD options are set above,
-    # with Linux.
-    ['OS=="openbsd" or OS=="freebsd"', {
-      'target_defaults': {
-        'ldflags': [
-          '-Wl,--no-keep-memory',
-        ],
-      },
-    }],
-    # Android-specific options; note that most are set above with Linux.
-    ['OS=="android"', {
-      'variables': {
-        # Placing this variable here prevents from forking libvpx, used
-        # by remoting.  Remoting is off, so it needn't built,
-        # so forking it's deps seems like overkill.
-        # But this variable need defined to properly run gyp.
-        # A proper solution is to have an OS==android conditional
-        # in third_party/libvpx/libvpx.gyp to define it.
-        'libvpx_path': 'lib/linux/arm',
-      },
-      'target_defaults': {
-        'variables': {
-          'release_extra_cflags%': '',
-          'conditions': [
-            # If we're using the components build, append "cr" to all shared
-            # libraries to avoid naming collisions with android system library
-            # versions with the same name (e.g. skia, icu).
-            ['component=="shared_library"', {
-              'android_product_extension': 'cr.so',
-            }, {
-              'android_product_extension': 'so',
-            } ],
-          ],
-        },
-        'target_conditions': [
-          ['_type=="shared_library"', {
-            'product_extension': '<(android_product_extension)',
-          }],
-
-          # Settings for building device targets using Android's toolchain.
-          # These are based on the setup.mk file from the Android NDK.
-          #
-          # The NDK Android executable link step looks as follows:
-          #  $LDFLAGS
-          #  $(TARGET_CRTBEGIN_DYNAMIC_O)  <-- crtbegin.o
-          #  $(PRIVATE_OBJECTS)            <-- The .o that we built
-          #  $(PRIVATE_STATIC_LIBRARIES)   <-- The .a that we built
-          #  $(TARGET_LIBGCC)              <-- libgcc.a
-          #  $(PRIVATE_SHARED_LIBRARIES)   <-- The .so that we built
-          #  $(PRIVATE_LDLIBS)             <-- System .so
-          #  $(TARGET_CRTEND_O)            <-- crtend.o
-          #
-          # For now the above are approximated for executables by adding
-          # crtbegin.o to the end of the ldflags and 'crtend.o' to the end
-          # of 'libraries'.
-          #
-          # The NDK Android shared library link step looks as follows:
-          #  $LDFLAGS
-          #  $(PRIVATE_OBJECTS)            <-- The .o that we built
-          #  -l,--whole-archive
-          #  $(PRIVATE_WHOLE_STATIC_LIBRARIES)
-          #  -l,--no-whole-archive
-          #  $(PRIVATE_STATIC_LIBRARIES)   <-- The .a that we built
-          #  $(TARGET_LIBGCC)              <-- libgcc.a
-          #  $(PRIVATE_SHARED_LIBRARIES)   <-- The .so that we built
-          #  $(PRIVATE_LDLIBS)             <-- System .so
-          #
-          # For now, assume that whole static libraries are not needed.
-          #
-          # For both executables and shared libraries, add the proper
-          # libgcc.a to the start of libraries which puts it in the
-          # proper spot after .o and .a files get linked in.
-          #
-          # TODO: The proper thing to do longer-tem would be proper gyp
-          # support for a custom link command line.
-          ['_toolset=="target"', {
-            'cflags!': [
-              '-pthread',  # Not supported by Android toolchain.
-            ],
-            'cflags': [
-              '-ffunction-sections',
-              '-funwind-tables',
-              '-g',
-              '-fstack-protector',
-              '-fno-short-enums',
-              '-finline-limit=64',
-              '<@(release_extra_cflags)',
-              '--sysroot=<(android_ndk_sysroot)',
-            ],
-            'cflags_cc': [
-              # NOTE: The libc++ header include paths below are specified in
-              # cflags rather than include_dirs because they need to come
-              # after include_dirs.
-              # The include ordering here is important; change with caution.
-              '-isystem<(android_libcpp_include)',
-              '-isystem<(android_ndk_root)/sources/cxx-stl/llvm-libc++abi/libcxxabi/include',
-              '-isystem<(android_ndk_root)/sources/android/support/include',
-            ],
-            'defines': [
-              'ANDROID',
-              '__GNU_SOURCE=1',  # Necessary for clone()
-              # The NDK has these things, but doesn't define the constants
-              # to say that it does. Define them here instead.
-              'HAVE_SYS_UIO_H',
-              'ANDROID_NDK_VERSION=<(android_ndk_version)',
-            ],
-            'ldflags!': [
-              '-pthread',  # Not supported by Android toolchain.
-            ],
-            'ldflags': [
-              '-Wl,--build-id=sha1',
-              '-Wl,--no-undefined',
-              '--sysroot=<(android_ndk_sysroot)',
-              '-nostdlib',
-              '-L<(android_libcpp_libs_dir)',
-              # Don't allow visible symbols from libgcc or libc++ to be
-              # re-exported.
-              '-Wl,--exclude-libs=libgcc.a',
-              '-Wl,--exclude-libs=libc++_static.a',
-              # Don't allow visible symbols from libraries that contain
-              # assembly code with symbols that aren't hidden properly.
-              # http://crbug.com/448386
-              '-Wl,--exclude-libs=libcommon_audio.a',
-              '-Wl,--exclude-libs=libcommon_audio_neon.a',
-              '-Wl,--exclude-libs=libcommon_audio_sse2.a',
-              '-Wl,--exclude-libs=libiSACFix.a',
-              '-Wl,--exclude-libs=libisac_neon.a',
-              '-Wl,--exclude-libs=libopus.a',
-              '-Wl,--exclude-libs=libvpx.a',
-            ],
-            'libraries': [
-              '-l<(android_libcpp_library)',
-              '-latomic',
-              # Manually link the libgcc.a that the cross compiler uses.
-              '<!(<(android_toolchain)/*-gcc -print-libgcc-file-name)',
-              '-lc',
-              '-ldl',
-              '-lm',
-            ],
-            'conditions': [
-              ['component=="static_library"', {
-                'target_conditions': [
-                  ['use_native_jni_exports==0', {
-                    # Use a linker version script to strip JNI exports from
-                    # binaries which have not specifically asked to use them.
-                    'ldflags': [
-                      '-Wl,--version-script=<!(cd <(DEPTH) && pwd -P)/build/android/android_no_jni_exports.lst',
-                    ],
-                  }],
-                ],
-              }],
-              ['clang==1', {
-                'libraries!': [
-                  # Clang with libc++ does not require an explicit atomic
-                  # library reference.
-                  '-latomic',
-                ],
-                'cflags': [
-                  # Work around incompatibilities between bionic and clang
-                  # headers.
-                  '-D__compiler_offsetof=__builtin_offsetof',
-                  '-Dnan=__builtin_nan',
-                ],
-                'cflags!': [
-                  # Clang does not support the following options.
-                  '-finline-limit=64',
-                ],
-                'conditions': [
-                  ['target_arch=="arm"', {
-                    'cflags': [
-                      '-target arm-linux-androideabi',
-                    ],
-                    'ldflags': [
-                      '-target arm-linux-androideabi',
-                    ],
-                  }],
-                  ['target_arch=="ia32"', {
-                    'cflags': [
-                      '-target i686-linux-androideabi',
-                    ],
-                    'ldflags': [
-                      '-target i686-linux-androideabi',
-                    ],
-                  }],
-                  # Place holder for arm64 support, not tested.
-                  # TODO: Enable clang support for Android Arm64. http://crbug.com/539781
-                  ['target_arch=="arm64"', {
-                    'cflags': [
-                      '-target aarch64-linux-androideabi',
-                    ],
-                    'ldflags': [
-                      '-target aarch64-linux-androideabi',
-                    ],
-                  }],
-                  # Place holder for x64 support, not tested.
-                  # TODO: Enable clang support for Android x64. http://crbug.com/539781
-                  ['target_arch=="x64"', {
-                    'cflags': [
-                      '-target x86_64-linux-androideabi',
-                    ],
-                    'ldflags': [
-                      '-target x86_64-linux-androideabi',
-                    ],
-                  }],
-                ],
-              }],
-              ['asan==1', {
-                'cflags': [
-                  # Android build relies on -Wl,--gc-sections removing
-                  # unreachable code. ASan instrumentation for globals inhibits
-                  # this and results in a library with unresolvable relocations.
-                  # TODO(eugenis): find a way to reenable this.
-                  '-mllvm -asan-globals=0',
-                ],
-              }],
-              ['target_arch == "arm" and order_profiling==0', {
-                'ldflags': [
-                  # Enable identical code folding to reduce size.
-                  '-Wl,--icf=<(gold_icf_level)',
-                ],
-              }],
-              ['target_arch=="ia32"', {
-                # The x86 toolchain currently has problems with stack-protector.
-                'cflags!': [
-                  '-fstack-protector',
-                ],
-                'cflags': [
-                  '-fno-stack-protector',
-                ],
-              }],
-            ],
-            'target_conditions': [
-              ['_type=="executable"', {
-                'cflags': [
-                  '-fPIE',
-                ],
-                'ldflags': [
-                  '-Bdynamic',
-                  '-Wl,--gc-sections',
-                  '-Wl,-z,nocopyreloc',
-                  '-pie',
-                  # crtbegin_dynamic.o should be the last item in ldflags.
-                  '<(android_ndk_lib)/crtbegin_dynamic.o',
-                ],
-                'libraries': [
-                  # crtend_android.o needs to be the last item in libraries.
-                  # Do not add any libraries after this!
-                  '<(android_ndk_lib)/crtend_android.o',
-                ],
-              }],
-              ['_type=="shared_library" or _type=="loadable_module"', {
-                'ldflags': [
-                  '-Wl,-shared,-Bsymbolic',
-                  # crtbegin_so.o should be the last item in ldflags.
-                  '<(android_ndk_lib)/crtbegin_so.o',
-                ],
-                'libraries': [
-                  # crtend_so.o needs to be the last item in libraries.
-                  # Do not add any libraries after this!
-                  '<(android_ndk_lib)/crtend_so.o',
-                ],
-              }],
-            ],
-          }],
-          # Settings for building host targets using the system toolchain.
-          ['_toolset=="host"', {
-            'cflags!': [
-              # Due to issues in Clang build system, using ASan on 32-bit
-              # binaries on x86_64 host is problematic.
-              # TODO(eugenis): re-enable.
-              '-fsanitize=address',
-            ],
-            'ldflags!': [
-              '-fsanitize=address',
-              '-Wl,-z,noexecstack',
-              '-Wl,--gc-sections',
-              '-Wl,-O1',
-              '-Wl,--as-needed',
-              '-Wl,--warn-shared-textrel',
-              '-Wl,--fatal-warnings',
-            ],
-          }],
-          # Settings for building host targets on mac.
-          ['_toolset=="host" and host_os=="mac"', {
-            'ldflags!': [
-              '-Wl,-z,now',
-              '-Wl,-z,relro',
-            ],
-          }],
-        ],
-      },
-    }],
-    ['OS=="solaris"', {
-      'cflags!': ['-fvisibility=hidden'],
-      'cflags_cc!': ['-fvisibility-inlines-hidden'],
-    }],
-    ['OS=="mac" or OS=="ios"', {
-      'target_defaults': {
-        'mac_bundle': 0,
-        'xcode_settings': {
-          'ALWAYS_SEARCH_USER_PATHS': 'NO',
-          'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',  # -std=c++11
-          # Don't link in libarclite_macosx.a, see http://crbug.com/156530.
-          'CLANG_LINK_OBJC_RUNTIME': 'NO',          # -fno-objc-link-runtime
-          # Warn if automatic synthesis is triggered with
-          # the -Wobjc-missing-property-synthesis flag.
-          'CLANG_WARN_OBJC_MISSING_PROPERTY_SYNTHESIS': 'YES',
-          'COPY_PHASE_STRIP': 'NO',
-          'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
-          'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
-          'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',        # -fno-exceptions
-          'GCC_ENABLE_CPP_RTTI': 'NO',              # -fno-rtti
-          'GCC_ENABLE_PASCAL_STRINGS': 'NO',        # No -mpascal-strings
-          # GCC_INLINES_ARE_PRIVATE_EXTERN maps to -fvisibility-inlines-hidden
-          'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
-          'GCC_OBJC_CALL_CXX_CDTORS': 'YES',        # -fobjc-call-cxx-cdtors
-          'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',      # -fvisibility=hidden
-          'GCC_THREADSAFE_STATICS': 'NO',           # -fno-threadsafe-statics
-          'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES',    # -Werror
-          'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
-          'USE_HEADERMAP': 'NO',
-          'WARNING_CFLAGS': [
-            '-Wall',
-            '-Wextra',
-            # Don't warn about unused function parameters.
-            '-Wno-unused-parameter',
-            # Don't warn about the "struct foo f = {0};" initialization
-            # pattern.
-            '-Wno-missing-field-initializers',
-            # This warns on selectors from Cocoa headers (-length, -set).
-            # cfe-dev is currently discussing the merits of this warning.
-            # TODO(thakis): Reevaluate what to do with this, based on the
-            # cfe-dev discussion.
-            '-Wno-selector-type-mismatch',
-          ],
-          'conditions': [
-            ['chromium_mac_pch', {'GCC_PRECOMPILE_PREFIX_HEADER': 'YES'},
-                                 {'GCC_PRECOMPILE_PREFIX_HEADER': 'NO'}
-            ],
-            ['clang==1', {
-              'OTHER_CFLAGS': [
-                # See http://crbug.com/110262
-                '-fcolor-diagnostics',
-              ],
-            }],
-            # Note that the prebuilt Clang binaries should not be used for iOS
-            # development except for ASan builds.
-            ['clang_xcode==0', {
-              'CC': '$(SOURCE_ROOT)/<(clang_dir)/clang',
-              'LDPLUSPLUS': '$(SOURCE_ROOT)/<(clang_dir)/clang++',
-            }],
-            ['clang==1 and clang_xcode==0 and clang_use_chrome_plugins==1', {
-              'OTHER_CFLAGS': [
-                '<@(clang_chrome_plugins_flags)',
-              ],
-            }],
-            ['clang==1 and clang_xcode==0 and clang_load!=""', {
-              'OTHER_CFLAGS': [
-                '-Xclang', '-load', '-Xclang', '<(clang_load)',
-              ],
-            }],
-            ['clang==1 and clang_xcode==0 and clang_add_plugin!=""', {
-              'OTHER_CFLAGS': [
-                '-Xclang', '-add-plugin', '-Xclang', '<(clang_add_plugin)',
-              ],
-            }],
-          ],
-        },
-        'conditions': [
-          ['clang==1', {
-            'variables': {
-              'clang_dir': '../third_party/llvm-build/Release+Asserts/bin',
-            },
-          }],
-          ['asan==1', {
-            'xcode_settings': {
-              'OTHER_CFLAGS': [
-                '-fsanitize=address',
-                '-mllvm -asan-globals=0',  # http://crbug.com/352073
-                '-gline-tables-only',
-              ],
-            },
-          }],
-          ['sanitizer_coverage!=""', {
-            'target_conditions': [
-              ['_toolset=="target"', {
-                'cflags': [
-                  '-fsanitize-coverage=<(sanitizer_coverage)',
-                ],
-                'defines': [
-                  'SANITIZER_COVERAGE',
-                ],
-              }],
-            ],
-          }],
-        ],
-        'target_conditions': [
-          ['_type!="static_library"', {
-            'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
-            'conditions': [
-              ['asan==1', {
-                'xcode_settings': {
-                  'OTHER_LDFLAGS': [
-                    '-fsanitize=address',
-                  ],
-                },
-              }],
-              ['mac_write_linker_maps==1', {
-                'xcode_settings': {
-                  'OTHER_LDFLAGS': [
-                    '-Wl,-map,>(_target_name).map',
-                  ],
-                },
-              }],
-            ],
-          }],
-          ['_mac_bundle', {
-            'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
-            'target_conditions': [
-              ['_type=="executable"', {
-                'conditions': [
-                  ['asan==1', {
-                    'postbuilds': [
-                      {
-                        'variables': {
-                          # Define copy_asan_dylib_path in a variable ending in
-                          # _path so that gyp understands it's a path and
-                          # performs proper relativization during dict merging.
-                          'copy_asan_dylib_path':
-                            'mac/copy_asan_runtime_dylib.sh',
-                        },
-                        'postbuild_name': 'Copy ASan runtime dylib',
-                        'action': [
-                          '<(copy_asan_dylib_path)',
-                        ],
-                      },
-                    ],
-                  }],
-                ],
-              }],
-            ],
-          }],
-        ],  # target_conditions
-      },  # target_defaults
-    }],  # OS=="mac" or OS=="ios"
-    ['OS=="mac"', {
-      'target_defaults': {
-        'defines': [
-          # Prevent Mac OS X AssertMacros.h from defining macros that collide
-          # with common names, like 'check', 'require', and 'verify'.
-          # (Included by system header. Also exists on iOS but not included.)
-          # http://opensource.apple.com/source/CarbonHeaders/CarbonHeaders-18.1/AssertMacros.h
-          '__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORE=0',
-        ],
-        'variables': {
-          # These should end with %, but there seems to be a bug with % in
-          # variables that are intended to be set to different values in
-          # different targets, like these.
-          # Strip debugging symbols from the target.
-          'mac_strip': '<(mac_strip_release)',
-          'conditions': [
-            ['asan==1', {
-              'conditions': [
-                ['mac_want_real_dsym=="default"', {
-                  'mac_real_dsym': 1,
-                }, {
-                  'mac_real_dsym': '<(mac_want_real_dsym)'
-                }],
-              ],
-            }, {
-              'conditions': [
-                ['mac_want_real_dsym=="default"', {
-                  'mac_real_dsym': 0, # Fake .dSYMs are fine in most cases.
-                }, {
-                  'mac_real_dsym': '<(mac_want_real_dsym)'
-                }],
-              ],
-            }],
-          ],
-        },
-        'configurations': {
-          'Release_Base': {
-            'conditions': [
-              ['branding=="Chrome" and buildtype=="Official"', {
-                'xcode_settings': {
-                  'OTHER_CFLAGS': [
-                    # The Google Chrome Framework dSYM generated by dsymutil has
-                    # grown larger than 4GB, which dsymutil can't handle. Reduce
-                    # the amount of debug symbols.
-                    '-fno-standalone-debug',  # See http://crbug.com/479841
-                  ]
-                },
-              }],
-            ],
-          },  # configuration "Release"
-        },  # configurations
-        'xcode_settings': {
-          # Tell the compiler to use libc++'s headers and the linker to link
-          # against libc++.  The latter part normally requires OS X 10.7,
-          # but we still support running on 10.6.  How does this work?  Two
-          # parts:
-          # 1. Chromium's clang doesn't error on -mmacosx-version-min=10.6
-          #    combined with -stdlib=libc++ (it normally silently produced a
-          #    binary that doesn't run on 10.6)
-          # 2. Further down, library_dirs is set to
-          #    third_party/libc++-static, which contains a static
-          #    libc++.a library.  The linker then links against that instead
-          #    of against /usr/lib/libc++.dylib when it sees the -lc++ flag
-          #    added by the driver.
-          #
-          # In component builds, just link to the system libc++.  This has
-          # the effect of making everything depend on libc++, which means
-          # component-build binaries won't run on 10.6 (no libc++ there),
-          # but for a developer-only configuration that's ok.  (We don't
-          # want to raise the deployment target yet so that official and
-          # dev builds have the same deployment target.  This affects
-          # things like which functions are considered deprecated.)
-          'CLANG_CXX_LIBRARY': 'libc++',  # -stdlib=libc++
-
-          'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
-                                                    # (Equivalent to -fPIC)
-          # MACOSX_DEPLOYMENT_TARGET maps to -mmacosx-version-min
-          'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
-          # Keep pch files below xcodebuild/.
-          'SHARED_PRECOMPS_DIR': '$(CONFIGURATION_BUILD_DIR)/SharedPrecompiledHeaders',
-          'OTHER_CFLAGS': [
-            # Someday this can be replaced by an 'GCC_STRICT_ALIASING': 'NO'
-            # xcode_setting, but not until all downstream projects' mac bots are
-            # using xcode >= 4.6, because that's when the default value of the
-            # flag in the compiler switched.  Pre-4.6, the value 'NO' for that
-            # setting is a no-op as far as xcode is concerned, but the compiler
-            # behaves differently based on whether -fno-strict-aliasing is
-            # specified or not.
-            '-fno-strict-aliasing',  # See http://crbug.com/32204.
-          ],
-        },
-        'target_conditions': [
-          ['>(nacl_untrusted_build)==0 and component=="static_library"', {
-            # See the comment for CLANG_CXX_LIBRARY above for what this does.
-            # The NaCl toolchains have their own toolchain and don't need this.
-            # ASan requires 10.7+ and clang implicitly adds -lc++abi in ASan
-            # mode.  Our libc++.a contains both libc++ and libc++abi in one
-            # library, so it doesn't work in that mode.
-            'conditions': [
-              ['asan==0', {
-                'library_dirs': [ '<(DEPTH)/third_party/libc++-static' ],
-              }],
-            ],
-          }],
-          ['_type=="executable"', {
-            # Turn on position-independence (ASLR) for executables. When
-            # PIE is on for the Chrome executables, the framework will
-            # also be subject to ASLR.
-            'xcode_settings': {
-              'OTHER_LDFLAGS': [
-                '-Wl,-pie',  # Position-independent executable (MH_PIE)
-              ],
-            },
-          }],
-          ['(_type=="executable" or _type=="shared_library" or \
-             _type=="loadable_module") and mac_strip!=0', {
-            'target_conditions': [
-              ['mac_real_dsym == 1', {
-                # To get a real .dSYM bundle produced by dsymutil, set the
-                # debug information format to dwarf-with-dsym.  Since
-                # strip_from_xcode will not be used, set Xcode to do the
-                # stripping as well.
-                'configurations': {
-                  'Release_Base': {
-                    'xcode_settings': {
-                      'DEBUG_INFORMATION_FORMAT': 'dwarf-with-dsym',
-                      'DEPLOYMENT_POSTPROCESSING': 'YES',
-                      'STRIP_INSTALLED_PRODUCT': 'YES',
-                      'conditions': [
-                        # Only strip non-ASan builds.
-                        ['asan==0', {
-                          'target_conditions': [
-                            ['_type=="shared_library" or _type=="loadable_module"', {
-                              # The Xcode default is to strip debugging symbols
-                              # only (-S).  Local symbols should be stripped as
-                              # well, which will be handled by -x.  Xcode will
-                              # continue to insert -S when stripping even when
-                              # additional flags are added with STRIPFLAGS.
-                              'STRIPFLAGS': '-x',
-                            }],  # _type=="shared_library" or _type=="loadable_module"
-                          ],  # target_conditions
-                        }, {  # asan != 0
-                          'STRIPFLAGS': '-S',
-                        }],
-                      ],
-                    },  # xcode_settings
-                  },  # configuration "Release"
-                },  # configurations
-              }, {  # mac_real_dsym != 1
-                # To get a fast fake .dSYM bundle, use a post-build step to
-                # produce the .dSYM and strip the executable.  strip_from_xcode
-                # only operates in the Release configuration.
-                'postbuilds': [
-                  {
-                    'variables': {
-                      # Define strip_from_xcode in a variable ending in _path
-                      # so that gyp understands it's a path and performs proper
-                      # relativization during dict merging.
-                      'strip_from_xcode_path': 'mac/strip_from_xcode',
-                    },
-                    'postbuild_name': 'Strip If Needed',
-                    'action': ['<(strip_from_xcode_path)'],
-                  },
-                ],  # postbuilds
-              }],  # mac_real_dsym
-            ],  # target_conditions
-          }],  # (_type=="executable" or _type=="shared_library" or
-               #  _type=="loadable_module") and mac_strip!=0
-        ],  # target_conditions
-      },  # target_defaults
-    }],  # OS=="mac"
-    ['OS=="ios"', {
-      'target_defaults': {
-        'xcode_settings' : {
-          'ENABLE_BITCODE': 'NO',
-          'CLANG_CXX_LIBRARY': 'libc++',  # -stdlib=libc++
-
-          'conditions': [
-            # Older Xcodes do not support -Wno-deprecated-register, so pass an
-            # additional flag to suppress the "unknown compiler option" error.
-            # Restrict this flag to builds that are either compiling with Xcode
-            # or compiling with Xcode's Clang.  This will allow Ninja builds to
-            # continue failing on unknown compiler options.
-            # TODO(rohitrao): This flag is temporary and should be removed as
-            # soon as the iOS bots are updated to use Xcode 5.1.
-            ['clang_xcode==1', {
-              'WARNING_CFLAGS': [
-                '-Wno-unknown-warning-option',
-                # It's not possible to achieve nullability completeness before
-                # all builders are running Xcode 7. crbug.com/499809
-                '-Wno-nullability-completeness',
-              ],
-              'OTHER_CPLUSPLUSFLAGS': [
-                '$(inherited)',
-                # TODO(ios): Remove once Xcode's libc++ has LLVM r256325
-                '-isystem <!(cd <(DEPTH) && pwd -P)/third_party/llvm-build/Release+Asserts/include/c++/v1',
-              ],
-            }],
-
-            # Limit the valid architectures depending on "target_subarch".
-            # This need to include the "arm" architectures but also the "x86"
-            # ones (they are used when building for the simulator).
-            ['target_subarch=="arm32"', {
-              'VALID_ARCHS': ['armv7', 'i386'],
-            }],
-            ['target_subarch=="arm64"', {
-              'VALID_ARCHS': ['arm64', 'x86_64'],
-            }],
-            ['target_subarch=="both"', {
-              'VALID_ARCHS': ['arm64', 'armv7', 'x86_64', 'i386'],
-            }],
-          ],
-        },
-        'target_conditions': [
-          ['_toolset=="host"', {
-            'xcode_settings': {
-              'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
-              'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
-              'VALID_ARCHS': [
-                'x86_64',
-              ],
-              'ARCHS': [
-                'x86_64',
-              ],
-            },
-          }],
-          ['_toolset=="target"', {
-            'xcode_settings': {
-              # This section should be for overriding host settings. But,
-              # since we can't negate the iphone deployment target above, we
-              # instead set it here for target only.
-              'IPHONEOS_DEPLOYMENT_TARGET': '<(ios_deployment_target)',
-              'ARCHS': ['$(ARCHS_STANDARD_INCLUDING_64_BIT)'],
-            },
-          }],
-          ['_type=="executable"', {
-            'configurations': {
-              'Release_Base': {
-                'xcode_settings': {
-                  'DEPLOYMENT_POSTPROCESSING': 'YES',
-                  'STRIP_INSTALLED_PRODUCT': 'YES',
-                  'conditions': [
-                    ['buildtype=="Official"', {
-                      'DEBUG_INFORMATION_FORMAT': 'dwarf-with-dsym',
-                    }, {
-                      # Remove dSYM to reduce build time.
-                      'DEBUG_INFORMATION_FORMAT': 'dwarf',
-                    }],
-                  ],
-                },
-              },
-              'Debug_Base': {
-                'xcode_settings': {
-                  # Remove dSYM to reduce build time.
-                  'DEBUG_INFORMATION_FORMAT': 'dwarf',
-                },
-              },
-            },
-            'xcode_settings': {
-              'conditions': [
-                ['chromium_ios_signing', {
-                  # iOS SDK wants everything for device signed.
-                  'CODE_SIGN_IDENTITY[sdk=iphoneos*]': '<(chromium_ios_signing_identity)',
-                }, {
-                  'CODE_SIGNING_REQUIRED': 'NO',
-                  'CODE_SIGN_IDENTITY[sdk=iphoneos*]': '',
-                }],
-              ],
-            },
-          }],
-        ],  # target_conditions
-      },  # target_defaults
-    }],  # OS=="ios"
-    ['OS=="win"', {
-      'target_defaults': {
-        'defines': [
-          '_WIN32_WINNT=0x0A00',
-          'WINVER=0x0A00',
-          'WIN32',
-          '_WINDOWS',
-          'NOMINMAX',
-          'PSAPI_VERSION=1',
-          '_CRT_RAND_S',
-          'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
-          'WIN32_LEAN_AND_MEAN',
-          '_ATL_NO_OPENGL',
-          '_SECURE_ATL',
-          # _HAS_EXCEPTIONS must match ExceptionHandling in msvs_settings.
-          '_HAS_EXCEPTIONS=0',
-          # Silence some warnings; we can't switch the the 'recommended'
-          # versions as they're not available on old OSs.
-          '_WINSOCK_DEPRECATED_NO_WARNINGS',
-        ],
-        'conditions': [
-          ['buildtype=="Official"', {
-            # In official builds, targets can self-select an optimization
-            # level by defining a variable named 'optimize', and setting it
-            # to one of
-            # - "size", optimizes for minimal code size - the default.
-            # - "speed", optimizes for speed over code size.
-            # - "max", whole program optimization and link-time code
-            #   generation. This is very expensive and should be used
-            #   sparingly.
-            'variables': {
-              'optimize%': 'size',
-            },
-            'msvs_settings': {
-              'VCLinkerTool': {
-                # Set /LTCG for the official builds.
-                'LinkTimeCodeGeneration': '1',
-                'AdditionalOptions': [
-                  # Set the number of LTCG code-gen threads to eight.
-                  # The default is four. This gives a 5-10% link speedup.
-                  '/cgthreads:8',
-                ],
-              },
-            },
-            'target_conditions': [
-              ['optimize=="size"', {
-                'msvs_settings': {
-                  'VCCLCompilerTool': {
-                    # 1, optimizeMinSpace, Minimize Size (/O1)
-                    'Optimization': '1',
-                    # 2, favorSize - Favor small code (/Os)
-                    'FavorSizeOrSpeed': '2',
-                    'conditions': [
-                      # TODO(thakis): Remove clang==0 here, crbug.com/598772
-                      ['full_wpo_on_official==1 and clang==0', {
-                        # This implies link time code generation.
-                        'WholeProgramOptimization': 'true',
-                      }],
-                    ],
-                  },
-                },
-              }],
-              # This config is used to avoid a problem in ffmpeg, see
-              # http://crbug.com/264459.
-              ['optimize=="size_no_ltcg"', {
-                'msvs_settings': {
-                  'VCCLCompilerTool': {
-                    # 1, optimizeMinSpace, Minimize Size (/O1)
-                    'Optimization': '1',
-                    # 2, favorSize - Favor small code (/Os)
-                    'FavorSizeOrSpeed': '2',
-                  },
-                },
-              }],
-              ['optimize=="speed"', {
-                'msvs_settings': {
-                  'VCCLCompilerTool': {
-                    # 2, optimizeMaxSpeed, Maximize Speed (/O2)
-                    'Optimization': '2',
-                    # 1, favorSpeed - Favor fast code (/Ot)
-                    'FavorSizeOrSpeed': '1',
-                    'conditions': [
-                      # TODO(thakis): Remove clang==0 here, crbug.com/598772
-                      ['full_wpo_on_official==1 and clang==0', {
-                        # This implies link time code generation.
-                        'WholeProgramOptimization': 'true',
-                      }],
-                    ],
-                  },
-                },
-              }],
-              ['optimize=="max"', {
-                # Disable Warning 4702 ("Unreachable code") for the WPO/PGO
-                # builds. Probably anything that this would catch that
-                # wouldn't be caught in a normal build isn't going to
-                # actually be a bug, so the incremental value of C4702 for
-                # PGO builds is likely very small.
-                'msvs_disabled_warnings': [
-                  4702
-                ],
-                'msvs_settings': {
-                  'VCCLCompilerTool': {
-                    # 2, optimizeMaxSpeed, Maximize Speed (/O2)
-                    'Optimization': '2',
-                    # 1, favorSpeed - Favor fast code (/Ot)
-                    'FavorSizeOrSpeed': '1',
-                  },
-                },
-                # TODO(thakis): Remove clang==0 here, https://crbug.com/598772
-                'conditions': [
-                  ['clang==0', {
-                    'msvs_settings': {
-                      'VCCLCompilerTool': {
-                        # This implies link time code generation.
-                        'WholeProgramOptimization': 'true',
-                      },
-                    },
-                  }],
-                ],
-              }],
-            ],
-          }],
-          ['msvs_xtree_patched!=1', {
-            # If xtree hasn't been patched, then we disable C4702. Otherwise,
-            # it's enabled. This will generally only be true for system-level
-            # installed Express users.
-            'msvs_disabled_warnings': [
-              4702, # unreachable code
-            ],
-          }],
-          ['full_wpo_on_official==1', {
-            # Disable Warning 4702 ("Unreachable code") for the WPO/PGO
-            # builds. Probably anything that this would catch that
-            # wouldn't be caught in a normal build isn't going to
-            # actually be a bug, so the incremental value of C4702 for
-            # PGO builds is likely very small.
-            'msvs_disabled_warnings': [
-              4702
-            ],
-          }],
-        ],
-        # Add extra include directories here that need to be in front of the
-        # installed and packaged include directories. This may be needed in
-        # order to force a particular SDK version, such as to get VS 2013 to use
-        # the Windows 10 SDK. Beware of making the INCLUDE variable excessively
-        # long, and be sure to make corresponding changes to
-        # build\toolchain\win\setup_toolchain.py
-        'msvs_system_include_dirs': [
-        ],
-        'msvs_disabled_warnings': [
-          # C4091: 'typedef ': ignored on left of 'X' when no variable is
-          #                    declared.
-          # This happens in a number of Windows headers. Dumb.
-          4091,
-
-          # C4127: conditional expression is constant
-          # This warning can in theory catch dead code and other problems, but
-          # triggers in far too many desirable cases where the conditional
-          # expression is either set by macros or corresponds some legitimate
-          # compile-time constant expression (due to constant template args,
-          # conditionals comparing the sizes of different types, etc.).  Some of
-          # these can be worked around, but it's not worth it.
-          4127,
-
-          # C4351: new behavior: elements of array 'array' will be default
-          #        initialized
-          # This is a silly "warning" that basically just alerts you that the
-          # compiler is going to actually follow the language spec like it's
-          # supposed to, instead of not following it like old buggy versions
-          # did.  There's absolutely no reason to turn this on.
-          4351,
-
-          # C4355: 'this': used in base member initializer list
-          # It's commonly useful to pass |this| to objects in a class'
-          # initializer list.  While this warning can catch real bugs, most of
-          # the time the constructors in question don't attempt to call methods
-          # on the passed-in pointer (until later), and annotating every legit
-          # usage of this is simply more hassle than the warning is worth.
-          4355,
-
-          # C4503: 'identifier': decorated name length exceeded, name was
-          #        truncated
-          # This only means that some long error messages might have truncated
-          # identifiers in the presence of lots of templates.  It has no effect
-          # on program correctness and there's no real reason to waste time
-          # trying to prevent it.
-          4503,
-
-          # Warning C4589 says: "Constructor of abstract class ignores
-          # initializer for virtual base class." Disable this warning because it
-          # is flaky in VS 2015 RTM. It triggers on compiler generated
-          # copy-constructors in some cases.
-          4589,
-
-          # C4611: interaction between 'function' and C++ object destruction is
-          #        non-portable
-          # This warning is unavoidable when using e.g. setjmp/longjmp.  MSDN
-          # suggests using exceptions instead of setjmp/longjmp for C++, but
-          # Chromium code compiles without exception support.  We therefore have
-          # to use setjmp/longjmp for e.g. JPEG decode error handling, which
-          # means we have to turn off this warning (and be careful about how
-          # object destruction happens in such cases).
-          4611,
-
-          # TODO(maruel): These warnings are level 4. They will be slowly
-          # removed as code is fixed.
-          4100, # Unreferenced formal parameter
-          4121, # Alignment of a member was sensitive to packing
-          4244, # Conversion from 'type1' to 'type2', possible loss of data
-          4505, # Unreferenced local function has been removed
-          4510, # Default constructor could not be generated
-          4512, # Assignment operator could not be generated
-          4610, # Object can never be instantiated
-          4838, # Narrowing conversion. Doesn't seem to be very useful.
-          4995, # 'X': name was marked as #pragma deprecated
-          4996, # 'X': was declared deprecated (for GetVersionEx).
-
-          # These are variable shadowing warnings that are new in VS2015. We
-          # should work through these at some point -- they may be removed from
-          # the RTM release in the /W4 set.
-          4456, 4457, 4458, 4459,
-
-          # TODO(brucedawson): http://crbug.com/554200 4312 is a VS
-          # 2015 64-bit warning for integer to larger pointer
-          4312,
-
-          # TODO(brucedawson): http://crbug.com/593448 - C4595 is an 'illegal
-          # inline operator new' warning that is new in VS 2015 Update 2.
-          # This is equivalent to clang's no-inline-new-delete warning.
-          # See http://bugs.icu-project.org/trac/ticket/11122
-          4595,
-        ],
-        'msvs_settings': {
-          'VCCLCompilerTool': {
-            'AdditionalOptions': ['/MP'],
-            'MinimalRebuild': 'false',
-            'BufferSecurityCheck': 'true',
-            'EnableFunctionLevelLinking': 'true',
-            'RuntimeTypeInfo': 'false',
-            'WarningLevel': '4',
-            'WarnAsError': 'true',
-            'DebugInformationFormat': '3',
-            # ExceptionHandling must match _HAS_EXCEPTIONS above.
-            'ExceptionHandling': '0',
-          },
-          'VCLibrarianTool': {
-            'AdditionalOptions': ['/ignore:4221'],
-            'AdditionalLibraryDirectories': [
-              '<(windows_sdk_path)/Lib/win8/um/x86',
-            ],
-          },
-          'VCLinkerTool': {
-            'AdditionalDependencies': [
-              'wininet.lib',
-              'dnsapi.lib',
-              'version.lib',
-              'msimg32.lib',
-              'ws2_32.lib',
-              'usp10.lib',
-              'psapi.lib',
-              'dbghelp.lib',
-              'winmm.lib',
-              'shlwapi.lib',
-            ],
-            'AdditionalLibraryDirectories': [
-              '<(windows_sdk_path)/Lib/win8/um/x86',
-            ],
-            'GenerateDebugInformation': 'true',
-            'MapFileName': '$(OutDir)\\$(TargetName).map',
-            'FixedBaseAddress': '1',
-            # SubSystem values:
-            #   0 == not set
-            #   1 == /SUBSYSTEM:CONSOLE
-            #   2 == /SUBSYSTEM:WINDOWS
-            # Most of the executables we'll ever create are tests
-            # and utilities with console output.
-            'SubSystem': '1',
-          },
-          'VCMIDLTool': {
-            'GenerateStublessProxies': 'true',
-            'TypeLibraryName': '$(InputName).tlb',
-            'OutputDirectory': '$(IntDir)',
-            'HeaderFileName': '$(InputName).h',
-            'DLLDataFileName': '$(InputName).dlldata.c',
-            'InterfaceIdentifierFileName': '$(InputName)_i.c',
-            'ProxyFileName': '$(InputName)_p.c',
-          },
-          'VCResourceCompilerTool': {
-            'Culture' : '1033',
-            'AdditionalIncludeDirectories': [
-              '<(DEPTH)',
-              '<(SHARED_INTERMEDIATE_DIR)',
-            ],
-          },
-          'target_conditions': [
-            ['_type=="executable"', {
-              'VCManifestTool': {
-                'EmbedManifest': 'true',
-              },
-            }],
-            ['_type=="executable" and ">(win_exe_compatibility_manifest)"!=""', {
-              'VCManifestTool': {
-                'AdditionalManifestFiles': [
-                  '>(win_exe_compatibility_manifest)',
-                ],
-              },
-            }],
-          ],
-          'conditions': [
-            # Building with Clang on Windows is a work in progress and very
-            # experimental. See crbug.com/82385.
-            # Keep this in sync with the similar blocks in build/config/compiler/BUILD.gn
-            ['clang==1', {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  # Don't warn about unused function parameters.
-                  # (This is also used on other platforms.)
-                  '-Wno-unused-parameter',
-                  # Don't warn about the "struct foo f = {0};" initialization
-                  # pattern.
-                  '-Wno-missing-field-initializers',
-
-                  # TODO(hans): Make this list shorter eventually, http://crbug.com/504657
-                  '-Wno-microsoft-enum-value',  # http://crbug.com/505296
-                  '-Wno-unknown-pragmas',  # http://crbug.com/505314
-                  '-Wno-microsoft-cast',  # http://crbug.com/550065
-                ],
-              },
-            }],
-            ['clang==1 and clang_use_chrome_plugins==1', {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  '<@(clang_chrome_plugins_flags)',
-                ],
-              },
-            }],
-            ['clang==1 and MSVS_VERSION == "2013"', {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  '-fmsc-version=1800',
-                ],
-              },
-            }],
-            ['clang==1 and MSVS_VERSION == "2015"', {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  '-fmsc-version=1900',
-                ],
-              },
-            }],
-            ['clang==1 and "<!(python <(DEPTH)/build/win/use_ansi_codes.py)"=="True"', {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  # cmd.exe doesn't understand ANSI escape codes by default,
-                  # so only enable them if something emulating them is around.
-                  '-fansi-escape-codes',
-                  # Also see http://crbug.com/110262
-                  '-fcolor-diagnostics',
-                ],
-              },
-            }],
-          ],
-        },
-      },
-    }],
-    ['disable_nacl==1', {
-      'target_defaults': {
-        'defines': [
-          'DISABLE_NACL',
-        ],
-      },
-    }],
-    ['OS=="win" and msvs_use_common_linker_extras', {
-      'target_defaults': {
-        'msvs_settings': {
-          'VCLinkerTool': {
-            'DelayLoadDLLs': [
-              'dbghelp.dll',
-              'dwmapi.dll',
-              'shell32.dll',
-              'uxtheme.dll',
-            ],
-          },
-        },
-        'configurations': {
-          'x86_Base': {
-            'msvs_settings': {
-              'VCLinkerTool': {
-                'AdditionalOptions': [
-                  '/safeseh',
-                  '/dynamicbase',
-                  '/ignore:4199',
-                  '/ignore:4221',
-                  '/nxcompat',
-                  '/largeaddressaware',
-                ],
-              },
-              'conditions': [
-                ['asan==1', {
-                  # TODO(asan/win): Move this down into the general
-                  # win-target_defaults section once the 64-bit asan runtime
-                  # exists.  See crbug.com/345874.
-                  'VCCLCompilerTool': {
-                    'AdditionalOptions': [
-                      '-fsanitize=address',
-                      '-fsanitize-blacklist=<(PRODUCT_DIR)/../../tools/memory/asan/blacklist_win.txt',
-                      # Omit variable info to speed up /Z7 links.
-                      '-gline-tables-only',
-                    ],
-                    'AdditionalIncludeDirectories': [
-                      # MSVC needs to be able to find the sanitizer headers when
-                      # invoked via /fallback. This is critical for using macros
-                      # like ASAN_UNPOISON_MEMORY_REGION in files where we fall
-                      # back.
-                      '<(DEPTH)/<(make_clang_dir)/lib/clang/<!(python <(DEPTH)/tools/clang/scripts/update.py --print-clang-version)/include_sanitizer',
-                    ],
-                  },
-                  'VCLinkerTool': {
-                    'AdditionalLibraryDirectories': [
-                      # TODO(hans): If make_clang_dir is absolute, this breaks.
-                      '<(DEPTH)/<(make_clang_dir)/lib/clang/<!(python <(DEPTH)/tools/clang/scripts/update.py --print-clang-version)/lib/windows',
-                    ],
-                  },
-                  'target_conditions': [
-                    ['component=="shared_library"', {
-                      'VCLinkerTool': {
-                        'AdditionalDependencies': [
-                           'clang_rt.asan_dynamic-i386.lib',
-                           'clang_rt.asan_dynamic_runtime_thunk-i386.lib',
-                        ],
-                      },
-                    }],
-                    ['_type=="executable" and component=="static_library"', {
-                      'VCLinkerTool': {
-                        'AdditionalDependencies': [
-                           'clang_rt.asan-i386.lib',
-                        ],
-                      },
-                    }],
-                    ['(_type=="shared_library" or _type=="loadable_module") and component=="static_library"', {
-                      'VCLinkerTool': {
-                        'AdditionalDependencies': [
-                           'clang_rt.asan_dll_thunk-i386.lib',
-                        ],
-                      },
-                    }],
-                  ],
-                }],
-                ['sanitizer_coverage!=""', {
-                  # TODO(asan/win): Move this down into the general
-                  # win-target_defaults section once the 64-bit asan runtime
-                  # exists.  See crbug.com/345874.
-                  'VCCLCompilerTool': {
-                    'AdditionalOptions': [
-                      '-fsanitize-coverage=<(sanitizer_coverage)',
-                    ],
-                  },
-                }],
-              ],
-            },
-            'conditions': [
-              ['sanitizer_coverage!=""', {
-                # TODO(asan/win): Move this down into the general
-                # win-target_defaults section once the 64-bit asan runtime
-                # exists.  See crbug.com/345874.
-                'defines': [
-                  'SANITIZER_COVERAGE',
-                ],
-              }],
-            ],
-          },
-          'x64_Base': {
-            'msvs_settings': {
-              'VCLinkerTool': {
-                'AdditionalOptions': [
-                  # safeseh is not compatible with x64
-                  '/dynamicbase',
-                  '/ignore:4199',
-                  '/ignore:4221',
-                  '/nxcompat',
-                ],
-              },
-            },
-          },
-        },
-      },
-    }],
-    ['enable_new_npdevice_api==1', {
-      'target_defaults': {
-        'defines': [
-          'ENABLE_NEW_NPDEVICE_API',
-        ],
-      },
-    }],
-    # Don't warn about the "typedef 'foo' locally defined but not used"
-    # for gcc 4.8 and higher.
-    # TODO: remove this flag once all builds work. See crbug.com/227506
-    ['clang==0', {
-      'target_defaults': {
-        'cflags': [ '-Wno-unused-local-typedefs' ],
-      },
-    }],
-    ['clang==0 and host_clang==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="host"', { 'cflags!': [ '-Wno-unused-local-typedefs' ]}],
-        ],
-      },
-    }],
-    ['clang==1 and ((OS!="mac" and OS!="ios") or clang_xcode==0) '
-        'and OS!="win"', {
-      'make_global_settings': [
-        ['CC', '<(make_clang_dir)/bin/clang'],
-        ['CXX', '<(make_clang_dir)/bin/clang++'],
-        ['CC.host', '$(CC)'],
-        ['CXX.host', '$(CXX)'],
-      ],
-    }],
-    ['clang==1 and OS=="win"', {
-      'make_global_settings': [
-        # On Windows, gyp's ninja generator only looks at CC.
-        ['CC', '<(make_clang_dir)/bin/clang-cl'],
-      ],
-    }],
-    ['use_lld==1 and OS=="win"', {
-      'make_global_settings': [
-        # Limited to Windows because lld-link is the driver that is
-        # compatible with link.exe.
-        ['LD', '<(make_clang_dir)/bin/lld-link'],
-        # lld-link includes a replacement for lib.exe that can produce thin
-        # archives and understands bitcode (for use_lto==1).
-        ['AR', '<(make_clang_dir)/bin/lld-link /lib /llvmlibthin'],
-      ],
-    }],
-    ['OS=="android" and clang==0', {
-      # Hardcode the compiler names in the Makefile so that
-      # it won't depend on the environment at make time.
-      'make_global_settings': [
-        ['CC', '<!(/bin/echo -n <(android_toolchain)/*-gcc)'],
-        ['CXX', '<!(/bin/echo -n <(android_toolchain)/*-g++)'],
-        ['CC.host', '<(host_cc)'],
-        ['CXX.host', '<(host_cxx)'],
-      ],
-    }],
-    ['OS=="linux" and target_arch=="mipsel" and host_arch!="mipsel" and chromeos==0 and clang==0', {
-      # Set default mips cross tools on linux.  These can be overridden
-      # using CC,CXX,CC.host and CXX.host environment variables.
-      'make_global_settings': [
-        ['CC', '<!(which mipsel-linux-gnu-gcc)'],
-        ['CXX', '<!(which mipsel-linux-gnu-g++)'],
-        ['CC.host', '<(host_cc)'],
-        ['CXX.host', '<(host_cxx)'],
-      ],
-    }],
-    ['OS=="linux" and target_arch=="arm" and host_arch!="arm" and chromeos==0 and clang==0', {
-      # Set default ARM cross tools on linux.  These can be overridden
-      # using CC,CXX,CC.host and CXX.host environment variables.
-      'make_global_settings': [
-        ['CC', '<!(which arm-linux-gnueabihf-gcc)'],
-        ['CXX', '<!(which arm-linux-gnueabihf-g++)'],
-        ['CC.host', '<(host_cc)'],
-        ['CXX.host', '<(host_cxx)'],
-      ],
-    }],
-    ['use_goma==1', {
-      'make_global_settings': [
-       ['CC_wrapper', '<(gomadir)/gomacc'],
-       ['CXX_wrapper', '<(gomadir)/gomacc'],
-       ['CC.host_wrapper', '<(gomadir)/gomacc'],
-       ['CXX.host_wrapper', '<(gomadir)/gomacc'],
-      ],
-    }],
-    ['use_lto==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-flto',
-            ],
-            'xcode_settings': {
-              'LLVM_LTO': 'YES',
-            },
-          }],
-          # Work-around for http://openradar.appspot.com/20356002
-          ['_toolset=="target" and _type!="static_library"', {
-            'xcode_settings': {
-              'OTHER_LDFLAGS': [
-                '-Wl,-all_load',
-              ],
-            },
-          }],
-        ],
-      },
-    }],
-    ['use_lto==1 and clang==0', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-ffat-lto-objects',
-            ],
-          }],
-        ],
-      },
-    }],
-    ['use_lto==1 and clang==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'arflags': [
-              '--plugin', '../../<(make_clang_dir)/lib/LLVMgold.so',
-            ],
-            'cflags': [
-              '-fwhole-program-vtables',
-            ],
-            'ldflags': [
-              '-fwhole-program-vtables',
-            ],
-          }],
-        ],
-        'msvs_settings': {
-          'VCCLCompilerTool': {
-            'AdditionalOptions': [
-              # TODO(pcc): Add LTO support to clang-cl driver and use it here.
-              '-Xclang',
-              '-emit-llvm-bc',
-            ],
-          },
-        },
-      },
-    }],
-    # Apply a lower LTO optimization level as the default is too slow.
-    ['use_lto==1 and clang==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'ldflags': [
-              '-Wl,--plugin-opt,O1',
-              # Allows the linker to apply ICF to the LTO object file. Also, when
-              # targeting ARM, wWithout this flag, LTO produces a .text section
-              # that is larger than the maximum call displacement, preventing the
-              # linker from relocating calls (http://llvm.org/PR22999).
-              '-Wl,--plugin-opt,-function-sections',
-            ],
-          }],
-          ['_toolset=="target" and _type!="static_library"', {
-            'xcode_settings':  {
-              'OTHER_LDFLAGS': [
-                '-Wl,-mllvm,-O1',
-              ],
-            },
-          }],
-        ],
-        'msvs_settings': {
-          'VCLinkerTool': {
-            'AdditionalOptions': [
-              '/opt:lldlto=1',
-            ],
-          },
-        },
-      },
-    }],
-    ['(use_lto==1 or use_lto_o2==1) and clang==0', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'ldflags': [
-              '-flto=32',
-            ],
-          }],
-        ],
-      },
-    }],
-    ['(use_lto==1 or use_lto_o2==1) and clang==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'ldflags': [
-              '-flto',
-            ],
-          }],
-        ],
-      },
-    }],
-    ['cfi_diag==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-fno-sanitize-trap=cfi',
-              '-fsanitize-recover=cfi',
-            ],
-            'cflags_cc!': [
-              '-fno-rtti',
-            ],
-            'cflags!': [
-              '-fno-rtti',
-            ],
-            'ldflags': [
-              '-fno-sanitize-trap=cfi',
-              '-fsanitize-recover=cfi',
-            ],
-            'xcode_settings': {
-              'OTHER_CFLAGS': [
-                '-fno-sanitize-trap=cfi',
-                '-fsanitize-recover=cfi',
-              ],
-            },
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  '-fno-sanitize-trap=cfi',
-                  '-fsanitize-recover=cfi',
-                ],
-              },
-            },
-          }],
-          ['_toolset=="target" and _type!="static_library"', {
-            'xcode_settings':  {
-              'OTHER_LDFLAGS': [
-                '-fno-sanitize-trap=cfi',
-                '-fsanitize-recover=cfi',
-              ],
-            },
-          }],
-        ],
-      },
-    }],
-    ['cfi_vptr==1 and cfi_diag==0', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'defines': [
-              'CFI_ENFORCEMENT',
-            ],
-          }],
-        ],
-      },
-    }],
-    ['cfi_vptr==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-fsanitize=cfi-vcall',
-              '-fsanitize-blacklist=<(cfi_blacklist)',
-            ],
-            'ldflags': [
-              '-fsanitize=cfi-vcall',
-              '-fsanitize=cfi-derived-cast',
-              '-fsanitize=cfi-unrelated-cast',
-            ],
-            'xcode_settings': {
-              'OTHER_CFLAGS': [
-                '-fsanitize=cfi-vcall',
-                '-fsanitize-blacklist=<(cfi_blacklist)',
-              ],
-            },
-          }],
-          ['_toolset=="target" and _type!="static_library"', {
-            'xcode_settings':  {
-              'OTHER_LDFLAGS': [
-                '-fsanitize=cfi-vcall',
-              ],
-            },
-          }],
-        ],
-      },
-    }],
-    ['cfi_vptr==1 and cfi_cast==1', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'cflags': [
-              '-fsanitize=cfi-derived-cast',
-              '-fsanitize=cfi-unrelated-cast',
-            ],
-            'ldflags': [
-              '-fsanitize=cfi-derived-cast',
-              '-fsanitize=cfi-unrelated-cast',
-            ],
-            'xcode_settings': {
-              'OTHER_CFLAGS': [
-                '-fsanitize=cfi-derived-cast',
-                '-fsanitize=cfi-unrelated-cast',
-              ],
-            },
-          }],
-          ['_toolset=="target" and _type!="static_library"', {
-            'xcode_settings':  {
-              'OTHER_LDFLAGS': [
-                '-fsanitize=cfi-derived-cast',
-                '-fsanitize=cfi-unrelated-cast',
-              ],
-            },
-          }],
-        ],
-      },
-    }],
-    ['cfi_vptr==1 and OS=="win"', {
-      'target_defaults': {
-        'target_conditions': [
-          ['_toolset=="target"', {
-            'msvs_settings': {
-              'VCCLCompilerTool': {
-                'AdditionalOptions': [
-                  # TODO(pcc): Use regular -fsanitize=* flags here once clang-cl
-                  # supports LTO.
-                  '-Xclang',
-                  '-fsanitize=cfi-vcall',
-                  '-Xclang',
-                  '-fsanitize=cfi-derived-cast',
-                  '-Xclang',
-                  '-fsanitize=cfi-unrelated-cast',
-                  '-Xclang',
-                  '-fsanitize-trap=cfi-vcall',
-                  '-Xclang',
-                  '-fsanitize-trap=cfi-derived-cast',
-                  '-Xclang',
-                  '-fsanitize-trap=cfi-unrelated-cast',
-                  '-Xclang',
-                  '-fsanitize-blacklist=<(cfi_blacklist)',
-                  '-Xclang',
-                  '-fsanitize-blacklist=../../<(make_clang_dir)/lib/clang/<!(python <(DEPTH)/tools/clang/scripts/update.py --print-clang-version)/cfi_blacklist.txt',
-                ],
-              },
-            },
-          }],
-        ],
-      },
-    }],
-  ],
-  'xcode_settings': {
-    # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!
-    # This block adds *project-wide* configuration settings to each project
-    # file.  It's almost always wrong to put things here.  Specify your
-    # custom xcode_settings in target_defaults to add them to targets instead.
-
-    'conditions': [
-      # In an Xcode Project Info window, the "Base SDK for All Configurations"
-      # setting sets the SDK on a project-wide basis. In order to get the
-      # configured SDK to show properly in the Xcode UI, SDKROOT must be set
-      # here at the project level.
-      ['OS=="mac"', {
-        'ARCHS': [ 'x86_64' ],
-        'conditions': [
-          ['mac_sdk_path==""', {
-            'SDKROOT': 'macosx<(mac_sdk)',  # -isysroot
-          }, {
-            'SDKROOT': '<(mac_sdk_path)',  # -isysroot
-          }],
-        ],
-      }],
-      ['OS=="ios"', {
-        # Target both iPhone and iPad.
-        'TARGETED_DEVICE_FAMILY': '1,2',
-        'conditions': [
-          ['ios_sdk_path==""', {
-            'SDKROOT': 'iphoneos<(ios_sdk)',  # -isysroot
-          }, {
-            'SDKROOT': '<(ios_sdk_path)',  # -isysroot
-          }],
-        ],
-      }],
-    ],
-
-    # The Xcode generator will look for an xcode_settings section at the root
-    # of each dict and use it to apply settings on a file-wide basis.  Most
-    # settings should not be here, they should be in target-specific
-    # xcode_settings sections, or better yet, should use non-Xcode-specific
-    # settings in target dicts.  SYMROOT is a special case, because many other
-    # Xcode variables depend on it, including variables such as
-    # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
-    # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
-    # files to appear (when present) in the UI as actual files and not red
-    # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
-    # and therefore SYMROOT, needs to be set at the project level.
-    'SYMROOT': '<(DEPTH)/xcodebuild',
-  },
 }