content: Cleanup class/struct forward declarations

content/public/browser/resource_dispatcher_host_delegate.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_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 13 matching lines @@
 class URLRequest;
 }
 
 namespace content {
 
 class AppCacheService;
 class NavigationData;
 class ResourceContext;
 class ResourceDispatcherHostLoginDelegate;
 class ResourceThrottle;
-struct Referrer;
 struct ResourceResponse;
 struct StreamInfo;
 
 // Interface that the embedder provides to ResourceDispatcherHost to allow
 // observing and modifying requests.
 class CONTENT_EXPORT ResourceDispatcherHostDelegate {
  public:
   // Called when a request begins. Return false to abort the request.
   virtual bool ShouldBeginRequest(const std::string& method,
                                   const GURL& url,
@@ skipping 96 matching lines @@
   virtual void OnAbortedFrameLoad(const GURL& url,
                                   base::TimeDelta request_loading_time);
 
  protected:
   virtual ~ResourceDispatcherHostDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_