GCC 4.3 fixes....

webkit/glue/alt_404_page_resource_fetcher.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__
 #define WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 
 #include "webkit/glue/resource_fetcher.h"
 
 class WebFrameLoaderClient;
-class WebCore::DocumentLoader;
-class WebCore::Frame;
-class WebCore::ResourceResponse;
 
 // ResourceHandleClient implementation that is used for downloading alternate
 // 404 pages. Once downloading is done (or fails), the WebFrameLoaderClient is
 // notified.
 class Alt404PageResourceFetcher : public ResourceFetcher::Delegate {
  public:
   Alt404PageResourceFetcher(WebFrameLoaderClient* webframeloaderclient,
                             WebCore::Frame* frame,
                             WebCore::DocumentLoader* doc_loader,
                             const GURL& url);
@@ skipping 17 matching lines @@
   // The DocumentLoader associated with this load.  If there's an error
   // talking with the alt 404 page server, we need this to complete the
   // original load.
   RefPtr<WebCore::DocumentLoader> doc_loader_;
 
   DISALLOW_EVIL_CONSTRUCTORS(Alt404PageResourceFetcher);
 };
 
 #endif  // WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__