Upgrade gtest to r267 and gmock to r173.

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.
         'gmock/include/gmock/gmock-actions.h',
         'gmock/include/gmock/gmock-cardinalities.h',
         'gmock/include/gmock/gmock-generated-actions.h',
         'gmock/include/gmock/gmock-generated-function-mockers.h',
         'gmock/include/gmock/gmock-generated-matchers.h',
         'gmock/include/gmock/gmock-generated-nice-strict.h',
         'gmock/include/gmock/gmock-matchers.h',
         'gmock/include/gmock/gmock-printers.h',
         'gmock/include/gmock/gmock-spec-builders.h',
         'gmock/include/gmock/gmock.h',
@@ skipping 41 matching lines @@
       'type': '<(library)',
       'dependencies': [
         'gmock',
       ],
       'sources': [
         'gmock/src/gmock_main.cc',
       ],
     },
   ],
 }