PPAPI: Make blocking completion callbacks work.

ppapi/proxy/ppb_audio_proxy.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/ppb_audio_proxy.h"
 
 #include "base/compiler_specific.h"
 #include "base/threading/simple_thread.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_audio.h"
@@ skipping 29 matching lines @@
         void* user_data);
   virtual ~Audio();
 
   // Resource overrides.
   virtual PPB_Audio_API* AsPPB_Audio_API();
 
   // PPB_Audio_API implementation.
   virtual PP_Resource GetCurrentConfig() OVERRIDE;
   virtual PP_Bool StartPlayback() OVERRIDE;
   virtual PP_Bool StopPlayback() OVERRIDE;
-  virtual int32_t OpenTrusted(PP_Resource config_id,
-                              PP_CompletionCallback create_callback) OVERRIDE;
+  virtual int32_t OpenTrusted(
+      PP_Resource config_id,
+      scoped_refptr<TrackedCallback> create_callback) OVERRIDE;
   virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;
 
  private:
   // Owning reference to the current config object. This isn't actually used,
   // we just dish it out as requested by the plugin.
   PP_Resource config_;
 
   DISALLOW_COPY_AND_ASSIGN(Audio);
 };
@@ skipping 36 matching lines @@
   if (!playing())
     return PP_TRUE;
   PluginDispatcher::GetForResource(this)->Send(
       new PpapiHostMsg_PPBAudio_StartOrStop(
           API_ID_PPB_AUDIO, host_resource(), false));
   SetStopPlaybackState();
   return PP_TRUE;
 }
 
 int32_t Audio::OpenTrusted(PP_Resource config_id,
-                           PP_CompletionCallback create_callback) {
+                           scoped_refptr<TrackedCallback> create_callback) {
   return PP_ERROR_NOTSUPPORTED;  // Don't proxy the trusted interface.
 }
 
 int32_t Audio::GetSyncSocket(int* sync_socket) {
   return PP_ERROR_NOTSUPPORTED;  // Don't proxy the trusted interface.
 }
 
 int32_t Audio::GetSharedMemory(int* shm_handle, uint32_t* shm_size) {
   return PP_ERROR_NOTSUPPORTED;  // Don't proxy the trusted interface.
 }
@@ skipping 194 matching lines @@
     base::SharedMemory temp_mem(handle, false);
   } else {
     static_cast<Audio*>(enter.object())->SetStreamInfo(
         enter.resource()->pp_instance(), handle, length,
         IPC::PlatformFileForTransitToPlatformFile(socket_handle));
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi