Use AudioStreamMonitor to control power save blocking.

content/content_tests.gypi

 # Copyright (c) 2013 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': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 503 matching lines @@
         'browser/indexed_db/mock_indexed_db_factory.h',
         'browser/indexed_db/leveldb/leveldb_unittest.cc',
         'browser/indexed_db/list_set_unittest.cc',
         'browser/loader/resource_buffer_unittest.cc',
         'browser/loader/resource_dispatcher_host_unittest.cc',
         'browser/loader/resource_loader_unittest.cc',
         'browser/loader/resource_scheduler_unittest.cc',
         'browser/loader/temporary_file_stream_unittest.cc',
         'browser/loader/upload_data_stream_builder_unittest.cc',
         'browser/mach_broker_mac_unittest.cc',
+        'browser/media/audio_stream_monitor_unittest.cc',
         'browser/media/capture/audio_mirroring_manager_unittest.cc',
         'browser/media/capture/video_capture_oracle_unittest.cc',
         'browser/media/capture/web_contents_audio_input_stream_unittest.cc',
         'browser/media/capture/web_contents_video_capture_device_unittest.cc',
         'browser/media/media_internals_unittest.cc',
         'browser/media/midi_host_unittest.cc',
         'browser/media/webrtc_identity_store_unittest.cc',
         'browser/net/sqlite_persistent_cookie_store_unittest.cc',
         'browser/notification_service_impl_unittest.cc',
         'browser/plugin_loader_posix_unittest.cc',
@@ skipping 1347 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }