Remove #pragma once from content

content/common/gpu/x_util.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 CHROME_GPU_X_UTIL_H_
 #define CHROME_GPU_X_UTIL_H_
-#pragma once
 
 // Some X-Windows specific stuff. This can be included on any platform, and will
 // be a NOP on non-Linux ones.
 
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_config.h"
 
 #if defined(USE_X11)
 
 // Forward declares ------------------------------------------------------------
@@ skipping 20 matching lines @@
 //   scoped_ptr_mallox<XVisualInfo, ScopedPtrXFree> foo(...);
 // where "XVisualInfo" is any X type that is freed with XFree.
 class ScopedPtrXFree {
  public:
   void operator()(void* x) const;
 };
 
 #endif  // USE_X11
 
 #endif  // CHROME_GPU_X_UTIL_H_