Increase the buffer size in AudioRendererImpl to fix muted playback rate

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',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:http_server',
@@ skipping 457 matching lines @@
     'browser/renderer_host/java/java_bridge_dispatcher_host_manager.cc',
     'browser/renderer_host/java/java_bridge_dispatcher_host_manager.h',
     'browser/renderer_host/java/java_bridge_dispatcher_host.cc',
     'browser/renderer_host/java/java_bridge_dispatcher_host.h',
     'browser/renderer_host/java/java_method.cc',
     'browser/renderer_host/java/java_method.h',
     'browser/renderer_host/java/java_type.cc',
     'browser/renderer_host/java/java_type.h',
     'browser/renderer_host/layered_resource_handler.cc',
     'browser/renderer_host/layered_resource_handler.h',
-    'browser/renderer_host/media/audio_common.cc',
-    'browser/renderer_host/media/audio_common.h',
     'browser/renderer_host/media/audio_input_device_manager.cc',
     'browser/renderer_host/media/audio_input_device_manager.h',
     'browser/renderer_host/media/audio_input_device_manager_event_handler.h',
     'browser/renderer_host/media/audio_input_renderer_host.cc',
     'browser/renderer_host/media/audio_input_renderer_host.h',
     'browser/renderer_host/media/audio_input_sync_writer.cc',
     'browser/renderer_host/media/audio_input_sync_writer.h',
     'browser/renderer_host/media/audio_renderer_host.cc',
     'browser/renderer_host/media/audio_renderer_host.h',
     'browser/renderer_host/media/audio_sync_reader.cc',
@@ skipping 372 matching lines @@
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }