[PPAPI] Pepper MediaStream API audio track implementation and example.

ppapi/ppapi_proxy.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.
 
 {
   'target_defaults': {
     'variables': {
       'ppapi_proxy_target': 0,
     },
     'target_conditions': [
       # This part is shared between the targets defined below.
       ['ppapi_proxy_target==1', {
         'sources': [
           # Take some standalone files from the C++ wrapper allowing us to more
           # easily make async callbacks in the proxy. We can't depend on the
           # full C++ wrappers at this layer since the C++ wrappers expect
           # symbols defining the globals for "being a plugin" which we are not.
           # These callback files are standalone.
           'cpp/completion_callback.h',
           'utility/completion_callback_factory.h',
 
+          'proxy/audio_frame_resource.cc',
+          'proxy/audio_frame_resource.h',
           'proxy/audio_input_resource.cc',
           'proxy/audio_input_resource.h',
           'proxy/broker_dispatcher.cc',
           'proxy/broker_dispatcher.h',
           'proxy/broker_resource.cc',
           'proxy/broker_resource.h',
           'proxy/browser_font_singleton_resource.cc',
           'proxy/browser_font_singleton_resource.h',
           'proxy/connection.h',
           'proxy/device_enumeration_resource_helper.cc',
@@ skipping 45 matching lines @@
           'proxy/host_resolver_resource_base.h',
           'proxy/host_var_serialization_rules.cc',
           'proxy/host_var_serialization_rules.h',
           'proxy/interface_list.cc',
           'proxy/interface_list.h',
           'proxy/interface_proxy.cc',
           'proxy/interface_proxy.h',
           'proxy/isolated_file_system_private_resource.cc',
           'proxy/isolated_file_system_private_resource.h',
           'proxy/locking_resource_releaser.h',
+          'proxy/media_stream_audio_track_resource.cc',
+          'proxy/media_stream_audio_track_resource.h',
           'proxy/media_stream_track_resource_base.cc',
           'proxy/media_stream_track_resource_base.h',
           'proxy/media_stream_video_track_resource.cc',
           'proxy/media_stream_video_track_resource.h',
           'proxy/net_address_resource.cc',
           'proxy/net_address_resource.h',
           'proxy/network_list_resource.cc',
           'proxy/network_list_resource.h',
           'proxy/network_monitor_resource.cc',
           'proxy/network_monitor_resource.h',
@@ skipping 170 matching lines @@
               'proxy/serialized_flash_menu.cc',
               'proxy/talk_resource.cc',
               'proxy/video_capture_resource.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }