chrome: Cleanup class/struct forward declarations

chrome/browser/ui/ash/launcher/launcher_favicon_loader.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 CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "content/public/common/favicon_url.h"
 
-class GURL;
 class SkBitmap;
 
 namespace internal {
 class FaviconRawBitmapHandler;
 }
 
 namespace content {
 class WebContents;
 }
 
@@ skipping 26 matching lines @@
   bool HasPendingDownloads() const;
 
  private:
   content::WebContents* web_contents_;
   std::unique_ptr<internal::FaviconRawBitmapHandler> favicon_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherFaviconLoader);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_LAUNCHER_FAVICON_LOADER_H_