Cleanup: Remove unneeded forward declarations in chrome/renderer.

chrome/renderer/safe_browsing/malware_dom_details.h

 // Copyright (c) 2011 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.
 //
 // MalwareDOMDetails iterates over a document's frames and gathers
 // interesting URLs such as those of scripts and frames. When done, it sends
 // them to the MalwareDetails that requested them.
 
 #ifndef CHROME_RENDERER_SAFE_BROWSING_MALWARE_DOM_DETAILS_H_
 #define CHROME_RENDERER_SAFE_BROWSING_MALWARE_DOM_DETAILS_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/task.h"
 #include "content/public/renderer/render_view_observer.h"
 
-class GURL;
-
 namespace WebKit {
 class WebElement;
-class WebFrame;
 }
 
 struct SafeBrowsingHostMsg_MalwareDOMDetails_Node;
 
 namespace safe_browsing {
 
 // There is one MalwareDOMDetails per RenderView.
 class MalwareDOMDetails : public content::RenderViewObserver {
  public:
   // An upper limit on the number of nodes we collect. Not const for the test.
@@ skipping 23 matching lines @@
       const WebKit::WebElement& element,
       SafeBrowsingHostMsg_MalwareDOMDetails_Node* parent_node,
       std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node>* resources);
 
   DISALLOW_COPY_AND_ASSIGN(MalwareDOMDetails);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_RENDERER_SAFE_BROWSING_MALWARE_DOM_DETAILS_H_