Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 8f9cb381cfe09b36f4bbf64e5e6957d620e4cd05..ad0261cf5480ed6bda6e3a81515e2b25e75f9cb2 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -387,10 +387,13 @@
       # -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 ASan. This flag also
       # controls coverage granularity (1 for function-level coverage, 2 for
       # block-level coverage).
       'asan_coverage%': 0,
+      # 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).
@@ -637,6 +640,16 @@
       # compiler. Always do this by default.
       'host_clang%': 1,
 
+      # Variables to control Link-Time Optimizations (LTO).
+      # Note: 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.
+      # Enable LTO on the code compiled with -Os.
+      # See crbug.com/407544
+      'use_lto%': 0,
+      # Enable LTO on code compiled with -O2.
+      'use_lto_o2%': 0,
+
       'conditions': [
         # A flag for POSIX platforms
         ['OS=="win"', {
@@ -1110,7 +1123,9 @@
     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     'mac_want_real_dsym%': '<(mac_want_real_dsym)',
     'asan%': '<(asan)',
+    'asan_blacklist%': '<(asan_blacklist)',
     'asan_coverage%': '<(asan_coverage)',
+    'asan_field_padding%': '<(asan_field_padding)',
     'use_sanitizer_options%': '<(use_sanitizer_options)',
     'syzyasan%': '<(syzyasan)',
     'syzygy_optimize%': '<(syzygy_optimize)',
@@ -1185,6 +1200,8 @@
     'proprietary_codecs%': '<(proprietary_codecs)',
     'use_goma%': '<(use_goma)',
     'gomadir%': '<(gomadir)',
+    'use_lto%': '<(use_lto)',
+    'use_lto_o2%': '<(use_lto_o2)',
     'video_hole%': '<(video_hole)',
     'enable_load_completion_hacks%': '<(enable_load_completion_hacks)',
     'support_pre_M6_history_database%': '<(support_pre_M6_history_database)',
@@ -2313,6 +2330,11 @@
       }, {
          'use_seccomp_bpf%': 0,
       }],
+      # Set component build with LTO until all tests pass.
+      # This also reduces link time.
+      ['use_lto==1', {
+        'component%': "shared_library",
+      }],
     ],
 
     # older history files use fts2 instead of fts3
@@ -3755,6 +3777,13 @@
                     'cflags': [
                       '-march=<(arm_arch)',
                     ],
+                    'conditions': [
+                      ['use_lto==1 or use_lto_o2==1', {
+                        'ldflags': [
+                          '-march=<(arm_arch)',
+                        ],
+                      }],
+                    ],
                   }],
                   ['clang==1 and OS!="android"', {
                     'cflags': [
@@ -3767,21 +3796,49 @@
                     '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
@@ -4060,6 +4117,7 @@
               ['_toolset=="target"', {
                 'cflags': [
                   '-fsanitize=address',
+                  '-fsanitize-blacklist=<(asan_blacklist)',
                 ],
                 'ldflags': [
                   '-fsanitize=address',
@@ -4121,6 +4179,15 @@
               }],
             ],
           }],
+          ['asan_field_padding!=0', {
+            'target_conditions': [
+              ['_toolset=="target"', {
+                'cflags': [
+                  '-fsanitize-address-field-padding=<(asan_field_padding)',
+                ],
+              }],
+            ],
+          }],
           ['lsan==1', {
             'target_conditions': [
               ['_toolset=="target"', {
@@ -5685,6 +5752,29 @@
        ['CXX.host_wrapper', '<(gomadir)/gomacc'],
       ],
     }],
+    ['use_lto==1', {
+      'target_defaults': {
+        'target_conditions': [
+          ['_toolset=="target"', {
+            'cflags': [
+              '-flto',
+              '-ffat-lto-objects',
+            ],
+          }],
+        ],
+      },
+    }],
+    ['use_lto==1 or use_lto_o2==1', {
+      'target_defaults': {
+        'target_conditions': [
+          ['_toolset=="target"', {
+            'ldflags': [
+              '-flto=32',
+            ],
+          }],
+        ],
+      },
+    }],
   ],
   'xcode_settings': {
     # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!