content/child: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

ppapi/nacl_irt/ppapi_dispatcher.h

 // Copyright 2014 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_NACL_IRT_PPAPI_DISPATCHER_H_
 #define PPAPI_NACL_IRT_PPAPI_DISPATCHER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 34 matching lines @@
                         public proxy::PluginProxyDelegate,
                         public IPC::Listener,
                         public IPC::Sender {
  public:
   PpapiDispatcher(scoped_refptr<base::MessageLoopProxy> io_loop,
                   base::WaitableEvent* shutdown_event,
                   int browser_ipc_fd,
                   int renderer_ipc_fd);
 
   // PluginDispatcher::PluginDelegate implementation.
-  base::MessageLoopProxy* GetIPCMessageLoop() override;
+  base::SingleThreadTaskRunner* GetIPCTaskRunner() override;
   base::WaitableEvent* GetShutdownEvent() override;
   IPC::PlatformFileForTransit ShareHandleWithRemote(
       base::PlatformFile handle,
       base::ProcessId peer_pid,
       bool should_close_source) override;
   std::set<PP_Instance>* GetGloballySeenInstanceIDSet() override;
   uint32 Register(proxy::PluginDispatcher* plugin_dispatcher) override;
   void Unregister(uint32 plugin_dispatcher_id) override;
 
   // PluginProxyDelegate implementation.
@@ skipping 23 matching lines @@
 
   scoped_refptr<base::MessageLoopProxy> message_loop_;
   base::WaitableEvent* shutdown_event_;
   int renderer_ipc_fd_;
   scoped_ptr<IPC::SyncChannel> channel_;
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_NACL_IRT_PPAPI_DISPATCHER_H_