PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_audio_impl.h

Index: webkit/plugins/ppapi/ppb_audio_impl.h
diff --git a/webkit/plugins/ppapi/ppb_audio_impl.h b/webkit/plugins/ppapi/ppb_audio_impl.h
index 19acfc3e12c94483768c2d706b82f7ded1b1a984..be41e3600662260cea4fd48f00284fe376046926 100644
--- a/webkit/plugins/ppapi/ppb_audio_impl.h
+++ b/webkit/plugins/ppapi/ppb_audio_impl.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -57,8 +57,9 @@ class PPB_Audio_Impl : public ::ppapi::Resource,
   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< ::ppapi::TrackedCallback> create_callback) OVERRIDE;
   virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;