Update from https://crrev.com/305340

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 23 matching lines @@
             '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=="mac" or OS=="ios"', {
+              ['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)',
@@ skipping 935 matching lines @@
 
         # Turn on JNI generation optimizations on non-WebView builds.
         ['OS=="android" and android_webview_build==0', {
           'optimize_jni_generation%': 1,
         }, {
           'optimize_jni_generation%': 0,
         }],
 
         # TODO(baixo): Enable v8_use_external_startup_data
         # http://crbug.com/421063
-        ['android_webview_build==0 and android_webview_telemetry_build==0 and chromecast==0', {
-          'v8_use_external_startup_data': 0,
+        ['android_webview_build==0 and android_webview_telemetry_build==0 and chromecast==0 and OS=="android"', {
+          'v8_use_external_startup_data': 1,
         }, {
           'v8_use_external_startup_data': 0,
         }],
       ],
 
       # 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
@@ skipping 1256 matching lines @@
             'arm_fpu%': 'neon',
           }, {
             'arm_fpu%': 'vfpv3-d16',
           }],
         ],
         # Change the default to hard once the armhf transition is complete.
         'arm_float_abi%': 'softfp',
         'arm_thumb%': 1,
       }],
 
+      # Set default compiler flags depending on MIPS architecture variant.
+      ['target_arch=="mipsel" and mips_arch_variant=="r2" and android_webview_build==0', {
+        'mips_fpu_mode%': 'fp32',
+      }],
+
       ['android_webview_build==1', {
         # The WebView build gets its cpu-specific flags from the Android build system.
         'arm_arch%': '',
         'arm_tune%': '',
         'arm_fpu%': '',
         'arm_float_abi%': '',
         'arm_thumb%': 0,
+        'mips_fpu_mode%': '',
       }],
 
       # Enable brlapi by default for chromeos.
       [ 'chromeos==1', {
         'use_brlapi%': 1,
       }],
 
       ['use_ozone==1 and ozone_auto_platforms==1', {
         # Use test as the default platform.
         'ozone_platform%': 'test',
@@ skipping 862 matching lines @@
               'ole32.lib',
               'oleaut32.lib',
               'user32.lib',
               'uuid.lib',
               'odbc32.lib',
               'odbccp32.lib',
               'delayimp.lib',
               'credui.lib',
               'netapi32.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.
+              '/maxilksize:2147483647',
+            ],
           },
         },
       },
       'x86_Base': {
         'abstract': 1,
         'msvs_settings': {
           'VCLinkerTool': {
             'MinimumRequiredVersion': '5.01',  # XP.
             'TargetMachine': '1',
           },
@@ skipping 2221 matching lines @@
           # 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
-          4189, # Local variable is initialized but not referenced
           4244, # Conversion from 'type1' to 'type2', possible loss of data
           4481, # Nonstandard extension used: override specifier 'keyword'
           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
           4996, # 'X': was declared deprecated (for GetVersionEx).
         ],
         'msvs_settings': {
           'VCCLCompilerTool': {
@@ skipping 432 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',
   },
 }