Readd the gmock unittest example from the build as it causes link errors in XP Modules.

base/base.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
@@ skipping 590 matching lines @@
         'directory_watcher_unittest.cc',
         'field_trial_unittest.cc',
         'file_descriptor_shuffle_unittest.cc',
         'file_path_unittest.cc',
         'file_util_unittest.cc',
         'file_version_info_unittest.cc',
         'gfx/jpeg_codec_unittest.cc',
         'gfx/native_theme_unittest.cc',
         'gfx/png_codec_unittest.cc',
         'gfx/rect_unittest.cc',
+        'gmock_unittest.cc',
         'histogram_unittest.cc',
         'hmac_unittest.cc',
         'idletimer_unittest.cc',
         'json_reader_unittest.cc',
         'json_writer_unittest.cc',
         'lazy_instance_unittest.cc',
         'linked_ptr_unittest.cc',
         'mac_util_unittest.cc',
         'message_loop_unittest.cc',
         'object_watcher_unittest.cc',
@@ skipping 45 matching lines @@
       ],
       'include_dirs': [
         # word_iterator.h (used by word_iterator_unittest.cc) leaks an ICU
         # #include for unicode/uchar.h.  This should probably be cleaned up.
         '../third_party/icu38/public/common',
       ],
       'dependencies': [
         'base',
         'base_gfx',
         '../skia/skia.gyp:skia',
+        '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
       ],
       'conditions': [
         ['OS == "linux"', {
           'sources!': [
             'file_version_info_unittest.cc',
             # Linux has an implementation of idle_timer, but it's unclear
             # if we want it yet, so leave it 'unported' for now.
             'idletimer_unittest.cc',
             'worker_pool_linux_unittest.cc',
@@ skipping 75 matching lines @@
           'msvs_settings': {
             'VCLinkerTool': {
               'SubSystem': '2',         # Set /SUBSYSTEM:WINDOWS
             },
           },
         },
       ],
     }],
   ],
 }