Remove #pragma once from content

content/renderer/dom_storage/webstoragenamespace_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_RENDERER_DOM_STORAGE_WEBSTORAGENAMESPACE_IMPL_H_
 #define CONTENT_RENDERER_DOM_STORAGE_WEBSTORAGENAMESPACE_IMPL_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageNamespace.h"
 
 class WebStorageNamespaceImpl : public WebKit::WebStorageNamespace {
  public:
   // The default constructor creates a local storage namespace, the second
   // constructor should be used for session storage namepaces.
   WebStorageNamespaceImpl();
   explicit WebStorageNamespaceImpl(int64 namespace_id);
   virtual ~WebStorageNamespaceImpl();
 
   // See WebStorageNamespace.h for documentation on these functions.
   virtual WebKit::WebStorageArea* createStorageArea(
       const WebKit::WebString& origin);
   virtual WebKit::WebStorageNamespace* copy();
   virtual bool isSameNamespace(const WebStorageNamespace&) const;
 
  private:
   int64 namespace_id_;
 };
 
 #endif  // CONTENT_RENDERER_DOM_STORAGE_WEBSTORAGENAMESPACE_IMPL_H_