Force inclusion of build/common.gypi for all chromium gyp files.

testing/gmock.gyp

 # 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.
 
 {
-  'includes': [
-    '../build/common.gypi',
-  ],
   'targets': [
     {
       'target_name': 'gmock',
       'type': '<(library)',
       'msvs_guid': 'F9D886ED-B09F-4B74-932F-D8E4691E6B7F',
       'dependencies': [
         'gtest.gyp:gtest',
       ],
       'sources': [
         # Sources based on files in r173 of gmock.
@@ skipping 41 matching lines @@
       'type': '<(library)',
       'dependencies': [
         'gmock',
       ],
       'sources': [
         'gmock/src/gmock_main.cc',
       ],
     },
   ],
 }