Remove #pragma once from content

content/renderer/webplugin_delegate_proxy.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_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H_
 #define CONTENT_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H_
-#pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_channel.h"
@@ skipping 304 matching lines @@
   // back-buffer.
   gfx::Rect front_buffer_diff_;
 
   // The url of the main frame hosting the plugin.
   GURL page_url_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginDelegateProxy);
 };
 
 #endif  // CONTENT_RENDERER_WEBPLUGIN_DELEGATE_PROXY_H_