Revert of PPAPI: Never re-enter JavaScript for PostMessage.

ppapi/proxy/dispatcher.h

 // 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.
 
 #ifndef PPAPI_PROXY_DISPATCHER_H_
 #define PPAPI_PROXY_DISPATCHER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/tracked_objects.h"
-#include "ipc/message_filter.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/ppp.h"
 #include "ppapi/proxy/proxy_channel.h"
 #include "ppapi/proxy/interface_list.h"
 #include "ppapi/proxy/interface_proxy.h"
 #include "ppapi/proxy/plugin_var_tracker.h"
 #include "ppapi/shared_impl/api_id.h"
 
 namespace IPC {
@@ skipping 29 matching lines @@
 
   VarSerializationRules* serialization_rules() const {
     return serialization_rules_.get();
   }
 
   // Returns a non-owning pointer to the interface proxy for the given ID, or
   // NULL if the ID isn't found. This will create the proxy if it hasn't been
   // created so far.
   InterfaceProxy* GetInterfaceProxy(ApiID id);
 
-  // Adds the given filter to the IO thread.
-  void AddIOThreadMessageFilter(scoped_refptr<IPC::MessageFilter> filter);
+  // Adds the given filter to the IO thread. Takes ownership of the pointer.
+  void AddIOThreadMessageFilter(IPC::MessageFilter* filter);
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   PP_GetInterface_Func local_get_interface() const {
     return local_get_interface_;
   }
 
   const PpapiPermissions& permissions() const { return permissions_; }
 
@@ skipping 21 matching lines @@
 
   PpapiPermissions permissions_;
 
   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_DISPATCHER_H_