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

content/renderer/pepper/resource_converter.cc

 // Copyright 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.
 
 #include "content/renderer/pepper/resource_converter.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "content/renderer/pepper/pepper_file_system_host.h"
+#include "content/renderer/pepper/pepper_media_stream_audio_track_host.h"
 #include "content/renderer/pepper/pepper_media_stream_video_track_host.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/host/ppapi_host.h"
 #include "ppapi/host/resource_host.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/resource_var.h"
 #include "ppapi/shared_impl/scoped_pp_var.h"
 #include "third_party/WebKit/public/platform/WebFileSystem.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 #include "third_party/WebKit/public/web/WebDOMFileSystem.h"
@@ skipping 84 matching lines @@
     *pending_renderer_id = host->GetPpapiHost()->AddPendingResourceHost(
         scoped_ptr<ppapi::host::ResourceHost>(
             new PepperMediaStreamVideoTrackHost(host, instance, 0, track)));
     if (*pending_renderer_id == 0)
       return false;
 
     create_message->reset(
         new PpapiPluginMsg_MediaStreamVideoTrack_CreateFromPendingHost(id));
     return true;
   } else if (track.source().type() == blink::WebMediaStreamSource::TypeAudio) {
-    // TODO(penghuang): support audio track.
-    return false;
+    *pending_renderer_id = host->GetPpapiHost()->AddPendingResourceHost(
+        scoped_ptr<ppapi::host::ResourceHost>(
+            new PepperMediaStreamAudioTrackHost(host, instance, 0, track)));
+    if (*pending_renderer_id == 0)
+      return false;
+
+    create_message->reset(
+        new PpapiPluginMsg_MediaStreamAudioTrack_CreateFromPendingHost(id));
+    return true;
   }
 
   return false;
 }
 
 }  // namespace
 
 ResourceConverter::~ResourceConverter() {}
 
 ResourceConverterImpl::ResourceConverterImpl(PP_Instance instance,
@@ skipping 82 matching lines @@
     const IPC::Message& create_message,
     const IPC::Message& browser_host_create_message) {
   scoped_refptr<HostResourceVar> result =
       CreateResourceVar(pending_renderer_id, create_message);
   browser_host_create_messages_.push_back(browser_host_create_message);
   browser_vars.push_back(result);
   return result;
 }
 
 }  // namespace content