Cleanup: Remove unneeded forward declarations in chrome/renderer.

chrome/renderer/chrome_render_view_observer.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.
 
 #ifndef CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
 #define CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_
 #pragma once
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/task.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPermissionClient.h"
 
 class ChromeRenderProcessObserver;
 class ContentSettingsObserver;
 class DomAutomationController;
 class ExtensionDispatcher;
 class ExternalHostBindings;
-class FilePath;
 class SkBitmap;
 class TranslateHelper;
 struct ThumbnailScore;
-struct ViewMsg_Navigate_Params;
 
 namespace WebKit {
 class WebView;
 }
 namespace safe_browsing {
 class PhishingClassifierDelegate;
 }
 
 namespace webkit_glue {
 class ImageResourceFetcher;
@@ skipping 177 matching lines @@
   typedef std::vector<linked_ptr<webkit_glue::ImageResourceFetcher> >
       ImageResourceFetcherList;
 
   // ImageResourceFetchers schedule via DownloadImage.
   ImageResourceFetcherList image_fetchers_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderViewObserver);
 };
 
 #endif  // CHROME_RENDERER_CHROME_RENDER_VIEW_OBSERVER_H_