Remove calls to MessageLoop::current() in ipc.

ipc/ipc_logging.h

 // Copyright (c) 2011 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 IPC_IPC_LOGGING_H_
 #define IPC_IPC_LOGGING_H_
 
 #include <stdint.h>
 
 #include "ipc/ipc_message.h"  // For IPC_MESSAGE_LOG_ENABLED.
 
 #ifdef IPC_MESSAGE_LOG_ENABLED
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
-#include "base/message_loop/message_loop.h"
+#include "base/single_thread_task_runner.h"
 #include "ipc/ipc_export.h"
 
 // Logging function. |name| is a string in ASCII and |params| is a string in
 // UTF-8.
 typedef void (*LogFunction)(std::string* name,
                             const IPC::Message* msg,
                             std::string* params);
 
 typedef base::hash_map<uint32_t, LogFunction > LogFunctionMap;
 
@@ skipping 78 matching lines @@
   void Log(const LogData& data);
 
   bool enabled_;
   bool enabled_on_stderr_;  // only used on POSIX for now
   bool enabled_color_; // only used on POSIX for now
 
   std::vector<LogData> queued_logs_;
   bool queue_invoke_later_pending_;
 
   Sender* sender_;
-  base::MessageLoop* main_thread_;
+  scoped_refptr<base::SingleThreadTaskRunner> main_thread_;
 
   Consumer* consumer_;
 
   static LogFunctionMap* log_function_map_;
 };
 
 }  // namespace IPC
 
 #endif // IPC_MESSAGE_LOG_ENABLED
 
 #endif  // IPC_IPC_LOGGING_H_