Create extensions_test_support build target

chrome/chrome_tests_unit.gypi

 # Copyright 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 20 matching lines @@
         '../third_party/zlib/zlib.gyp:zlib',
         '../ui/message_center/message_center.gyp:message_center_test_support',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:test_support_base',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
-        '../extensions/browser/test_management_policy.cc',
-        '../extensions/browser/test_management_policy.h',
-        '../extensions/common/extension_builder.cc',
-        '../extensions/common/extension_builder.h',
-        '../extensions/common/value_builder.cc',
-        '../extensions/common/value_builder.h',
         'app/chrome_main_delegate.cc',
         'app/chrome_main_delegate.h',
         'browser/android/bookmarks/partner_bookmarks_shim_unittest.cc',
         'browser/android/mock_google_location_settings_helper.cc',
         'browser/android/mock_google_location_settings_helper.h',
         'browser/bookmarks/bookmark_test_helpers.cc',
         'browser/bookmarks/bookmark_test_helpers.h',
         'browser/browsing_data/mock_browsing_data_appcache_helper.cc',
         'browser/browsing_data/mock_browsing_data_appcache_helper.h',
         'browser/browsing_data/mock_browsing_data_cookie_helper.cc',
@@ skipping 235 matching lines @@
             'renderer',
             'utility',
             '../content/content.gyp:content_gpu',
             '../content/content.gyp:content_plugin',
             '../content/content.gyp:content_ppapi_plugin',
             '../content/content.gyp:content_renderer',
             '../content/content.gyp:content_utility',
             '../content/content.gyp:content_worker',
             '../components/components.gyp:autofill_core_test_support',
             '../components/components.gyp:sessions_test_support',
+            '../extensions/extensions.gyp:extensions_test_support',
             '../google_apis/google_apis.gyp:google_apis_test_support',
             '../ipc/ipc.gyp:test_support_ipc',
             '../media/media.gyp:media_test_support',
             '../ppapi/ppapi_internal.gyp:ppapi_shared',
             '../sql/sql.gyp:test_support_sql',
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
             '../webkit/child/webkit_child.gyp:webkit_child',
           ],
           'export_dependent_settings': [
             'renderer',
@@ skipping 2565 matching lines @@
             'browser/ui/app_list/test/fake_profile_store.h',
             'browser/ui/app_list/test/fast_show_pickler_unittest.cc',
             'browser/ui/views/app_list/linux/app_list_linux_unittest.cc',
             'browser/ui/views/app_list/win/app_list_win_unittest.cc',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }