PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_audio_impl.cc

Index: webkit/plugins/ppapi/ppb_audio_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_audio_impl.cc b/webkit/plugins/ppapi/ppb_audio_impl.cc
index 6e5115fe6e9cf872e9b5bcf54042ce6c44fa062f..aabb517269141ab8fa4491ce515d03f998fe4488 100644
--- a/webkit/plugins/ppapi/ppb_audio_impl.cc
+++ b/webkit/plugins/ppapi/ppb_audio_impl.cc
@@ -17,6 +17,7 @@
 #include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/resource_helper.h"
 
+using ppapi::ApiCallbackType;
 using ppapi::PpapiGlobals;
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_Audio_API;
@@ -113,7 +114,7 @@ PP_Bool PPB_Audio_Impl::StopPlayback() {
 }
 
 int32_t PPB_Audio_Impl::OpenTrusted(PP_Resource config,
-                                    PP_CompletionCallback create_callback) {
+                                    ApiCallbackType create_callback) {
   // Validate the config and keep a reference to it.
   EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
   if (enter.failed())
@@ -135,7 +136,7 @@ int32_t PPB_Audio_Impl::OpenTrusted(PP_Resource config,
   // At this point, we are guaranteeing ownership of the completion
   // callback.  Audio promises to fire the completion callback
   // once and only once.
-  SetCreateCallback(new TrackedCallback(this, create_callback));
+  SetCreateCallback(create_callback);
 
   return PP_OK_COMPLETIONPENDING;
 }