Fix for Bug 50726 "Save extension list and "winning" prefs from extensions"

chrome/chrome_common.gypi

 # Copyright (c) 2010 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.
 
 {
   'target_defaults': {
     'variables': {
       'chrome_common_target': 0,
     },
     'target_conditions': [
@@ skipping 241 matching lines @@
         'common/dom_storage_common.h',
         'common/file_system/file_system_dispatcher.cc',
         'common/file_system/file_system_dispatcher.h',
         'common/font_loader_mac.h',
         'common/font_loader_mac.mm',
         'common/gears_api.h',
         'common/gpu_plugin.cc',
         'common/gpu_plugin.h',
         'common/important_file_writer.cc',
         'common/important_file_writer.h',
+        'common/in_memory_pref_store.cc',
+        'common/in_memory_pref_store.h',
         'common/json_pref_store.cc',
         'common/json_pref_store.h',
         'common/json_schema_validator.cc',
         'common/json_schema_validator.h',
         'common/jstemplate_builder.cc',
         'common/jstemplate_builder.h',
         'common/libxml_utils.cc',
         'common/libxml_utils.h',
         'common/mru_cache.h',
         'common/navigation_gesture.h',
@@ skipping 307 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }