Remove #pragma once from content

content/common/child_process.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 CONTENT_COMMON_CHILD_PROCESS_H_
 #define CONTENT_COMMON_CHILD_PROCESS_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
 #include "base/synchronization/waitable_event.h"
 #include "content/common/content_export.h"
 
 class ChildThread;
 
 // Base class for child processes of the browser process (i.e. renderer and
@@ skipping 53 matching lines @@
   // io_thread_.
   scoped_ptr<ChildThread> main_thread_;
 
   // The singleton instance for this process.
   static ChildProcess* child_process_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcess);
 };
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_H_