PPAPI: Get TrackedCallback ready for running on non-main threads.

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 31 matching lines @@
     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;
   }
 
   void GotCompletion(int32_t result) {
-    TrackedCallback::ClearAndRun(&callback_, result);
+    callback_->Run(result);
   }
 
  private:
   scoped_refptr<TrackedCallback> callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Talk);
 };
 
 }  // namespace
 
@@ skipping 20 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