Remove #pragma once from content

content/browser/gpu/gpu_data_manager_impl.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 CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_
-#pragma once
 
 #include <set>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list_threadsafe.h"
 #include "base/synchronization/lock.h"
@@ skipping 89 matching lines @@
   FilePath swiftshader_path_;
 
   // Current card force-blacklisted due to GPU crashes, or disabled through
   // the --disable-gpu commandline switch.
   bool card_blacklisted_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuDataManagerImpl);
 };
 
 #endif  // CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_H_