Plugin Power Saver: Add UI Overlay to throttled plugin using placeholder.

chrome/chrome_renderer.gypi

 # Copyright (c) 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': {
     'chrome_renderer_sources': [
       'renderer/benchmarking_extension.cc',
       'renderer/benchmarking_extension.h',
       'renderer/isolated_world_ids.h',
@@ skipping 170 matching lines @@
       'renderer/pepper/pepper_flash_menu_host.cc',
       'renderer/pepper/pepper_flash_menu_host.h',
       'renderer/pepper/pepper_flash_renderer_host.cc',
       'renderer/pepper/pepper_flash_renderer_host.h',
       'renderer/pepper/pepper_helper.cc',
       'renderer/pepper/pepper_helper.h',
       'renderer/pepper/pepper_shared_memory_message_filter.cc',
       'renderer/pepper/pepper_shared_memory_message_filter.h',
       'renderer/pepper/pepper_uma_host.cc',
       'renderer/pepper/pepper_uma_host.h',
+      'renderer/plugins/plugin_preroller.cc',
+      'renderer/plugins/plugin_preroller.h',
     ],
     # For safe_browsing==1 or safe_browsing==2.
     'chrome_renderer_basic_safe_browsing_sources': [
       'renderer/safe_browsing/malware_dom_details.cc',
       'renderer/safe_browsing/malware_dom_details.h',
     ],
     # For safe_browsing==1 only.
     'chrome_renderer_safe_browsing_sources': [
       'renderer/safe_browsing/feature_extractor_clock.cc',
       'renderer/safe_browsing/feature_extractor_clock.h',
@@ skipping 195 matching lines @@
               'export_dependent_settings': [
                 '<(allocator_target)',
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }