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

content/content_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.
 
 {
   'dependencies': [
     '../gin/gin.gyp:gin',
     '../jingle/jingle.gyp:jingle_glue',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 672 matching lines @@
         'renderer/p2p/ipc_network_manager.h',
         'renderer/p2p/ipc_socket_factory.cc',
         'renderer/p2p/ipc_socket_factory.h',
         'renderer/p2p/network_list_observer.h',
         'renderer/p2p/port_allocator.cc',
         'renderer/p2p/port_allocator.h',
         'renderer/p2p/socket_client_impl.cc',
         'renderer/p2p/socket_client_impl.h',
         'renderer/p2p/socket_dispatcher.cc',
         'renderer/p2p/socket_dispatcher.h',
+        'renderer/pepper/pepper_media_stream_audio_track_host.cc',
+        'renderer/pepper/pepper_media_stream_audio_track_host.h',
         'renderer/pepper/pepper_media_stream_track_host_base.cc',
         'renderer/pepper/pepper_media_stream_track_host_base.h',
         'renderer/pepper/pepper_media_stream_video_track_host.cc',
         'renderer/pepper/pepper_media_stream_video_track_host.h',
         'renderer/pepper/pepper_video_destination_host.cc',
         'renderer/pepper/pepper_video_destination_host.h',
         'renderer/pepper/pepper_video_source_host.cc',
         'renderer/pepper/pepper_video_source_host.h',
       ],
     },{  # enable_webrtc==0
@@ skipping 53 matching lines @@
     }],
   ],
   'target_conditions': [
     ['OS=="android"', {
       'sources/': [
         ['include', '^renderer/render_view_linux\\.cc$'],
       ],
     }],
   ],
 }