Add a new version of the power save blocker class, to be implemented for all platforms.

content/content_browser.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.
 
 {
   'dependencies': [
     'browser/debugger/devtools_resources.gyp:devtools_resources',
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
@@ skipping 420 matching lines @@
     'browser/plugin_data_remover_impl.cc',
     'browser/plugin_data_remover_impl.h',
     'browser/plugin_loader_posix.cc',
     'browser/plugin_loader_posix.h',
     'browser/plugin_process_host.cc',
     'browser/plugin_process_host.h',
     'browser/plugin_process_host_mac.cc',
     'browser/plugin_service_impl.cc',
     'browser/plugin_service_impl.h',
     'browser/power_save_blocker.h',
+    'browser/power_save_blocker2.h',
     'browser/power_save_blocker_android.cc',
     'browser/power_save_blocker_common.cc',
     'browser/power_save_blocker_linux.cc',
     'browser/power_save_blocker_mac.cc',
     'browser/power_save_blocker_win.cc',
     'browser/ppapi_plugin_process_host.cc',
     'browser/ppapi_plugin_process_host.h',
     'browser/profiler_controller_impl.cc',
     'browser/profiler_controller_impl.h',
     'browser/profiler_message_filter.cc',
@@ skipping 506 matching lines @@
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }