Remove gcc_version from gyp and gn files.

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.
@@ skipping 1596 matching lines @@
             '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,
       }],
-      # The version of GCC in use, set later in platforms that use GCC and have
-      # not explicitly chosen to build with clang. Currently, this means all
-      # platforms except Windows, Mac and iOS.
-      # TODO(glider): set clang to 1 earlier for ASan and TSan builds so that
-      # it takes effect here.
-      ['os_posix==1 and OS!="mac" and OS!="ios" and clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan_vptr==0', {
-        'conditions': [
-          ['OS=="android"', {
-            'host_gcc_version%': '<!pymod_do_main(compiler_version host compiler)',
-            # We directly set the gcc version since we know what we use.
-            'gcc_version%': 49,
-          }, {
-            'host_gcc_version%': '<!pymod_do_main(compiler_version host compiler)',
-            'gcc_version%': '<!pymod_do_main(compiler_version target compiler)',
-          }],
-        ],
-      }, {
-        'host_gcc_version%': 0,
-        'gcc_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)',
       }],
       ['os_posix==1 and OS!="mac" and OS!="ios"', {
         'conditions': [
@@ skipping 2115 matching lines @@
                 'ldflags': [
                   '-Wl,--no-as-needed',
                 ],
               }],
               ['debug_unwind_tables==1', {
                 'cflags': ['-funwind-tables'],
               }, {
                 'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
                 'defines': ['NO_UNWIND_TABLES'],
               }],
-              # TODO(mostynb): shuffle clang/gcc_version/binutils_version
-              # definitions in to the right scope to use them when setting
-              # linux_use_debug_fission, so it can be used here alone.
-              ['linux_use_debug_fission==1 and linux_use_gold_flags==1 and (clang==1 or gcc_version>=48) and binutils_version>=223', {
+              ['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.
@@ skipping 259 matching lines @@
                     # 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': [
-                      ['gcc_version==48 and clang==0', {
-                        'cflags': [
-                          # The following 5 options are disabled to save on
-                          # binary size in GCC 4.8.
-                          '-fno-partial-inlining',
-                          '-fno-early-inlining',
-                          '-fno-tree-copy-prop',
-                          '-fno-tree-loop-optimize',
-                          '-fno-move-loop-invariants',
-                        ],
-                      }],
                       ['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
@@ skipping 620 matching lines @@
           ['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',
             ],
           }],
-          ['gcc_version>=47 and clang==0', {
+          ['clang==0', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags_cc': [
                   '-std=gnu++11',
                   # See comment for -Wno-c++11-narrowing.
                   '-Wno-narrowing',
                 ],
               }],
             ],
           }],
-          ['host_gcc_version>=47 and clang==0 and host_clang==0', {
+          ['clang==0 and host_clang==0', {
             'target_conditions': [
               ['_toolset=="host"', {
                 'cflags_cc': [
                   '-std=gnu++11',
                   # See comment for -Wno-c++11-narrowing.
                   '-Wno-narrowing',
                 ],
               }],
             ],
           }],
-          ['gcc_version>=47 and clang==0 and chromeos==1', {
+          ['clang==0 and chromeos==1', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags_cc': [
                   # TODO(thakis): Remove, http://crbug.com/263960
                   '-Wno-literal-suffix',
                 ],
               }],
             ],
           }],
-          ['host_gcc_version>=47 and clang==0 and host_clang==0 and chromeos==1', {
+          ['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',
                 ],
               }],
             ],
           }],
         ],
@@ skipping 1275 matching lines @@
     ['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
-    ['gcc_version>=48 and clang==0', {
+    ['clang==0', {
       'target_defaults': {
-        'cflags': [
-          '-Wno-unused-local-typedefs',
-        ],
+        'cflags': [ '-Wno-unused-local-typedefs' ],
       },
     }],
-    ['gcc_version>=48 and clang==0 and host_clang==1', {
+    ['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'],
@@ skipping 346 matching lines @@
     # 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',
   },
 }