Defer media playback in background tabs.

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/banners/app_banner_client.cc',
       'renderer/banners/app_banner_client.h',
       'renderer/benchmarking_extension.cc',
@@ skipping 138 matching lines @@
       'renderer/resources/extensions/input.ime_custom_bindings.js',
       'renderer/resources/extensions/log_private_custom_bindings.js',
       'renderer/resources/extensions/notifications_custom_bindings.js',
       'renderer/resources/extensions/omnibox_custom_bindings.js',
       'renderer/resources/extensions/page_action_custom_bindings.js',
       'renderer/resources/extensions/page_capture_custom_bindings.js',
       'renderer/resources/extensions/system_indicator_custom_bindings.js',
       'renderer/resources/extensions/tts_custom_bindings.js',
       'renderer/resources/extensions/tts_engine_custom_bindings.js',
     ],
-    'chrome_renderer_non_android_sources': [
-      'renderer/prerender/prerender_media_load_deferrer.cc',
-      'renderer/prerender/prerender_media_load_deferrer.h',
-    ],
     'chrome_renderer_plugin_sources': [
       'renderer/pepper/chrome_renderer_pepper_host_factory.cc',
       'renderer/pepper/chrome_renderer_pepper_host_factory.h',
       'renderer/pepper/pepper_flash_drm_renderer_host.cc',
       'renderer/pepper/pepper_flash_drm_renderer_host.h',
       'renderer/pepper/pepper_flash_font_file_host.cc',
       'renderer/pepper/pepper_flash_font_file_host.h',
       'renderer/pepper/pepper_flash_fullscreen_host.cc',
       'renderer/pepper/pepper_flash_fullscreen_host.h',
       'renderer/pepper/pepper_flash_menu_host.cc',
@@ skipping 207 matching lines @@
           ],
           'sources': [
             '<@(chrome_renderer_printing_sources)',
           ],
         }],
         ['enable_print_preview==1', {
           'sources': [
             '<@(chrome_renderer_full_printing_sources)',
           ],
         }],
-        ['OS!="android"', {
-          'sources': [
-            '<@(chrome_renderer_non_android_sources)',
-          ],
-        }],
         ['OS=="win"', {
           'dependencies': [
             '../components/components.gyp:dom_distiller_core',  # Needed by chrome_content_renderer_client.cc.
           ],
           'include_dirs': [
             '<(DEPTH)/third_party/wtl/include',
           ],
           'conditions': [
             ['win_use_allocator_shim==1', {
               'dependencies': [
                 '<(allocator_target)',
               ],
               'export_dependent_settings': [
                 '<(allocator_target)',
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }