Use gold from third_party/binutils rather then third_party/gold.

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 1321 matching lines @@
     # Set to 1 to compile with the hole punching for the protected video.
     'video_hole%': 0,
 
     'conditions': [
       # Enable the Syzygy optimization step for the official builds.
       ['OS=="win" and buildtype=="Official" and syzyasan!=1', {
         'syzygy_optimize%': 1,
       }, {
         'syzygy_optimize%': 0,
       }],
-
+      # Get binutils version so we can enable debug fission if we can.
+      ['os_posix==1 and OS!="mac" and OS!="ios"', {
+        'binutils_version%': '<!(python <(DEPTH)/build/compiler_version.py assembler)',
+        'conditions': [
+          # On Android we know the binutils version in the toolchain.
+          ['OS=="android"', {
+            'binutils_version%': 222,

[Lei Zhang, 2014/04/03 23:00:01]

In this case, since we already know, should this omit the '%', or do you still
want binutils_version to be overwritable from GYP_DEFINES?

Same for binutils_version and binutils_dir below.

[mithro-old, 2014/04/04 03:36:28]

Done.

+          }],
+          # Our version of binutils in third_party/binutils
+          ['linux_use_gold_binary==1', {
+            'binutils_version%': 224,
+            'conditions': [
+              ['host_arch=="x64"', {
+                'binutils_dir%': 'third_party/binutils/Linux_x64/Release',

[Lei Zhang, 2014/04/03 23:00:01]

Since there will always be a Release component in the path, move it down to line
3866/3869. Alternatively, specify path/to/Release/bin here and just use
<(binutils_dir) below?

[mithro-old, 2014/04/04 03:36:28]

Done.

+              }],
+              ['host_arch=="ia32"', {
+                'binutils_dir%': 'third_party/binutils/Linux_ia32/Release',
+              }],
+            ],
+          }],
+        ],
+      }, {
+        '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', {
         'conditions': [
           ['OS=="android"', {
             # We directly set the gcc_version since we know what we use.
             'conditions': [
               ['target_arch=="x64" or target_arch=="arm64"', {
                 'gcc_version%': 48,
               }, {
                 'gcc_version%': 46,
               }],
             ],
-            'binutils_version%': 222,
           }, {
             'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
-            'binutils_version%': '<!(python <(DEPTH)/build/compiler_version.py assembler)',
           }],
         ],
       }, {
         'gcc_version%': 0,
-        'binutils_version%': 0,
       }],
       ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(windows_sdk_default_path))"=="True"', {
         'windows_sdk_path%': '<(windows_sdk_default_path)',
       }, {
         'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/8.0',
       }],
       ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(directx_sdk_default_path))"=="True"', {
         'directx_sdk_path%': '<(directx_sdk_default_path)',
       }, {
         'directx_sdk_path%': '$(DXSDK_DIR)',
@@ skipping 2453 matching lines @@
                       # now.
                       #'-Wl,--icf=safe',
                       '-Wl,--icf=none',
                     ],
                   }],
                 ],
               }],
             ],
           }],
           ['linux_use_gold_binary==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.
+            'cflags': [
+              '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)/bin',
+            ],
             'ldflags': [
-              # Put our gold binary in the search path for the linker.
-              # 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.
-              '-B<!(cd <(DEPTH) && pwd -P)/third_party/gold',
+              '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)/bin',
             ],
           }],
         ],
       },
     }],
     # FreeBSD-specific options; note that most FreeBSD options are set above,
     # with Linux.
     ['OS=="freebsd"', {
       'target_defaults': {
         'ldflags': [
@@ skipping 1324 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',
   },
 }