Add a variable that forces the release mac builds to use -O1 instead of -Os f...

build/common.gypi

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     # .gyp files 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.
@@ skipping 173 matching lines @@
         ],
       },
       'Release': {
         'defines': [
           'NDEBUG',
         ],
         'conditions': [
           [ 'OS=="mac"', {
             'xcode_settings': {
               'DEAD_CODE_STRIPPING': 'YES',
+              'conditions': [
+                ['mac_release_optimization != "UNSET"',
+                  {'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)'}],
+              ],
             }
           }],
           [ 'OS=="win" and msvs_use_common_release', {
             'configuration_platform': 'Win32',
             'msvs_props': ['release.vsprops'],
           }],
           [ 'OS=="win"', {
             'msvs_settings': {
               'VCLinkerTool': {
                 'LinkIncremental': '1',
@@ skipping 188 matching lines @@
         ],
       },
     }],
     ['OS=="mac"', {
       'target_defaults': {
         'variables': {
           # This should be 'mac_real_dsym%', but there seems to be a bug
           # with % in variables that are intended to be set to different
           # values in different targets, like this one.
           'mac_real_dsym': 0,  # Fake .dSYMs are fine in most cases.
+          # Release defaults to the Xcode optimization default, this var
+          # lets you force the value.
+          'mac_release_optimization%': 'UNSET'
         },
         'mac_bundle': 0,
         'xcode_settings': {
           'ALWAYS_SEARCH_USER_PATHS': 'NO',
           'GCC_C_LANGUAGE_STANDARD': 'c99',
           'GCC_CW_ASM_SYNTAX': 'NO',
           'GCC_DYNAMIC_NO_PIC': 'NO',
           'GCC_ENABLE_PASCAL_STRINGS': 'NO',
           'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
           'GCC_OBJC_CALL_CXX_CDTORS': 'YES',
@@ skipping 176 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',
   },
 }