Register system Pepper Flash plugin if no packaged Pepper plugin is found.

chrome/chrome_browser.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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 1876 matching lines @@
       'browser/password_manager/save_password_infobar_delegate.h',
       'browser/password_manager/sync_metrics.cc',
       'browser/password_manager/sync_metrics.h',
     ],
     # See also the plugin_installation_sources list below.
     'chrome_browser_plugins_sources': [
       'browser/browsing_data/browsing_data_flash_lso_helper.cc',
       'browser/browsing_data/browsing_data_flash_lso_helper.h',
       'browser/component_updater/flash_component_installer.h',
       'browser/component_updater/pepper_flash_component_installer.cc',
-      'browser/component_updater/ppapi_utils.cc',
-      'browser/component_updater/ppapi_utils.h',
       'browser/metrics/plugin_metrics_provider.cc',
       'browser/metrics/plugin_metrics_provider.h',
       'browser/pepper_broker_infobar_delegate.cc',
       'browser/pepper_broker_infobar_delegate.h',
       'browser/pepper_flash_settings_manager.cc',
       'browser/pepper_flash_settings_manager.h',
       'browser/plugins/chrome_content_browser_client_plugins_part.cc',
       'browser/plugins/chrome_content_browser_client_plugins_part.h',
       'browser/plugins/chrome_plugin_service_filter.cc',
       'browser/plugins/chrome_plugin_service_filter.h',
@@ skipping 1801 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }