Cleanup: Remove unneeded forward declarations from various chrome/browser subdirectories.

chrome/browser/download/download_util.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.
 //
 // Download utilities.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "views/view.h"
 #endif
 
-class BaseDownloadItemModel;
-class CrxInstaller;
 class DownloadItem;
-class GURL;
-class Profile;
-class ResourceDispatcherHost;
-class SkBitmap;
-
-struct DownloadCreateInfo;
-struct DownloadSaveInfo;
 
 namespace base {
 class DictionaryValue;
-class TimeTicks;
-}
-
-namespace content {
-class ResourceContext;
 }
 
 namespace gfx {
 class Canvas;
 class Image;
 }
 
 namespace download_util {
 
 // Download temporary file creation --------------------------------------------
@@ skipping 117 matching lines @@
 // If |path| does not exist, 0 is returned.  If it fails to find such
 // a number, -1 is returned.
 int GetUniquePathNumberWithCrDownload(const FilePath& path);
 
 // Returns a .crdownload intermediate path for the |suggested_path|.
 FilePath GetCrDownloadPath(const FilePath& suggested_path);
 
 }  // namespace download_util
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_