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

ppapi/proxy/plugin_var_tracker.cc

 // 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.
 
 #include "ppapi/proxy/plugin_var_tracker.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "ipc/ipc_message.h"
 #include "ppapi/c/dev/ppp_class_deprecated.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/proxy/file_system_resource.h"
+#include "ppapi/proxy/media_stream_audio_track_resource.h"
 #include "ppapi/proxy/media_stream_video_track_resource.h"
 #include "ppapi/proxy/plugin_array_buffer_var.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/plugin_resource_var.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/proxy_object_var.h"
 #include "ppapi/shared_impl/api_id.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/proxy_lock.h"
@@ skipping 165 matching lines @@
       // Note: This only makes sense when the plugin is out of process (which
       // should always be true when passing resource vars).
       PP_Resource pp_resource =
           (new FileSystemResource(GetConnectionForInstance(instance),
                                   instance,
                                   pending_renderer_id,
                                   pending_browser_id,
                                   file_system_type))->GetReference();
       return MakeResourcePPVar(pp_resource);
     }
+    case PpapiPluginMsg_MediaStreamAudioTrack_CreateFromPendingHost::ID: {
+      DCHECK(pending_renderer_id);
+      std::string track_id;
+      if (!UnpackMessage<
+              PpapiPluginMsg_MediaStreamAudioTrack_CreateFromPendingHost>(
+          creation_message, &track_id)) {
+        NOTREACHED() <<
+            "Invalid message of type "
+            "PpapiPluginMsg_MediaStreamAudioTrack_CreateFromPendingHost";
+        return PP_MakeNull();
+      }
+      PP_Resource pp_resource =
+          (new MediaStreamAudioTrackResource(GetConnectionForInstance(instance),
+                                             instance,
+                                             pending_renderer_id,
+                                             track_id))->GetReference();
+      return MakeResourcePPVar(pp_resource);
+    }
     case PpapiPluginMsg_MediaStreamVideoTrack_CreateFromPendingHost::ID: {
       DCHECK(pending_renderer_id);
       std::string track_id;
       if (!UnpackMessage<
               PpapiPluginMsg_MediaStreamVideoTrack_CreateFromPendingHost>(
           creation_message, &track_id)) {
         NOTREACHED() <<
             "Invalid message of type "
             "PpapiPluginMsg_MediaStreamVideoTrack_CreateFromPendingHost";
         return PP_MakeNull();
@@ skipping 281 matching lines @@
     int id,
     PP_Instance instance,
     base::SharedMemoryHandle* handle,
     uint32* size_in_bytes) {
   NOTREACHED();
   return false;
 }
 
 }  // namesace proxy
 }  // namespace ppapi