Transfer user agent override info between browser and renderer

content/browser/web_contents/web_contents_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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 641 matching lines @@
   // A list of observers notified when page state changes. Weak references.
   // This MUST be listed above render_manager_ since at destruction time the
   // latter might cause RenderViewHost's destructor to call us and we might use
   // the observer list then.
   ObserverList<content::WebContentsObserver> observers_;
 
   // The tab that opened this tab, if any.  Will be set to null if the opener
   // is closed.
   WebContentsImpl* opener_;
 
-  // User agent to use if a NavigationEntry requires that the default user agent
-  // is overridden.
-  std::string user_agent_override_;
-
   // Helper classes ------------------------------------------------------------
 
   // Manages creation and swapping of render views.
   RenderViewHostManager render_manager_;
 
   // Manages injecting Java objects into all RenderViewHosts associated with
   // this WebContentsImpl.
   scoped_ptr<JavaBridgeDispatcherHostManager>
       java_bridge_dispatcher_host_manager_;
 
@@ skipping 116 matching lines @@
   content::ColorChooser* color_chooser_;
 
   // This must be at the end, or else we might get notifications and use other
   // member variables that are gone.
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_