Remove #pragma once from content

content/public/browser/session_storage_namespace.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_PUBLIC_BROWSER_SESSION_STORAGE_NAMESPACE_H_
 #define CONTENT_PUBLIC_BROWSER_SESSION_STORAGE_NAMESPACE_H_
-#pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 
 namespace content {
 
 // This is a ref-counted class that represents a SessionStorageNamespace.
 // On destruction it ensures that the storage namespace is destroyed.
@@ skipping 13 matching lines @@
   virtual void SetShouldPersist(bool should_persist) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<SessionStorageNamespace>;
   virtual ~SessionStorageNamespace() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SESSION_STORAGE_NAMESPACE_H_