PPAPI: Make blocking completion callbacks work.

ppapi/proxy/ppb_talk_private_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_talk_private_proxy.h"
 
 #include "ipc/ipc_message_macros.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
@@ skipping 11 matching lines @@
 
 class Talk : public Resource, public thunk::PPB_Talk_Private_API {
  public:
   Talk(PP_Instance instance) : Resource(OBJECT_IS_PROXY, instance) {
   }
 
   // Resource overrides.
   thunk::PPB_Talk_Private_API* AsPPB_Talk_Private_API() { return this; }
 
   // PPB_Talk_API implementation.
-  int32_t GetPermission(const PP_CompletionCallback& callback) {
+  int32_t GetPermission(scoped_refptr<TrackedCallback> callback) {
     if (TrackedCallback::IsPending(callback_))
       return PP_ERROR_INPROGRESS;
     PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(
         pp_instance());
     if (!dispatcher)
       return PP_ERROR_FAILED;
 
-    callback_ = new TrackedCallback(this, callback);
+    callback_ = callback;
 
     if (PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
         new PpapiHostMsg_PPBTalk_GetPermission(
             API_ID_PPB_TALK,
             dispatcher->plugin_dispatcher_id(),
             pp_resource())))
       return PP_OK_COMPLETIONPENDING;
     return PP_ERROR_FAILED;
   }
 
@@ skipping 32 matching lines @@
                                                    PP_Resource resource,
                                                    int32_t result) {
   thunk::EnterResourceNoLock<thunk::PPB_Talk_Private_API> enter(
       resource, false);
   if (enter.succeeded())
     static_cast<Talk*>(enter.object())->GotCompletion(result);
 }
 
 }  // namespace proxy
 }  // namespace ppapi