GYP variable v8_optimized_debug should be overridable by GYP_DEFINES

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 706 matching lines @@
           'use_openmax_dl_fft%': 0,
         }],
         ['OS=="win" or OS=="linux"', {
             'enable_mdns%' : 1,
         }],
 
         # Turns on compiler optimizations in V8 in Debug build, except
         # on android_clang, where we're hitting a weird linker error.
         # TODO(dpranke): http://crbug.com/266155 .
         ['OS=="android"', {
-          'v8_optimized_debug': 1,
+          'v8_optimized_debug%': 1,
         }, {
-          'v8_optimized_debug': 2,
+          'v8_optimized_debug%': 2,
         }],
       ],
 
       # 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
       # to use the Google-internal file containing official API keys
       # for Google Chrome even in a developer build.  Setting this
@@ skipping 138 matching lines @@
     'google_default_client_secret%': '<(google_default_client_secret)',
     'enable_managed_users%': '<(enable_managed_users)',
     'native_discardable_memory%': '<(native_discardable_memory)',
     'native_memory_pressure_signals%': '<(native_memory_pressure_signals)',
     'spdy_proxy_auth_origin%': '<(spdy_proxy_auth_origin)',
     'spdy_proxy_auth_property%': '<(spdy_proxy_auth_property)',
     'spdy_proxy_auth_value%': '<(spdy_proxy_auth_value)',
     'data_reduction_proxy_probe_url%': '<(data_reduction_proxy_probe_url)',
     'enable_mdns%' : '<(enable_mdns)',
     'enable_enhanced_bookmarks%' : '<(enable_enhanced_bookmarks)',
-    'v8_optimized_debug': '<(v8_optimized_debug)',
+    'v8_optimized_debug%': '<(v8_optimized_debug)',
     'proprietary_codecs%': '<(proprietary_codecs)',
 
     # Use system nspr instead of the bundled one.
     'use_system_nspr%': 0,
 
     # Use system protobuf instead of bundled one.
     'use_system_protobuf%': 0,
 
     # Use system yasm instead of bundled one.
     'use_system_yasm%': 0,
@@ skipping 3830 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',
   },
 }