chrome: Cleanup class/struct forward declarations

chrome/browser/extensions/api/file_handlers/app_file_handler_util.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_EXTENSIONS_API_FILE_HANDLERS_APP_FILE_HANDLER_UTIL_H_
 #define CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_APP_FILE_HANDLER_UTIL_H_
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handlers/file_handler_info.h"
 
 class Profile;
 
 namespace extensions {
 
-class ExtensionPrefs;
 struct EntryInfo;
 struct FileHandlerInfo;
 struct GrantedFileEntry;
 
 // TODO(benwells): move this to platform_apps namespace.
 namespace app_file_handler_util {
 
 extern const char kInvalidParameters[];
 extern const char kSecurityError[];
 
@@ skipping 44 matching lines @@
                                  const std::string& filesystem_path,
                                  int render_process_id,
                                  base::FilePath* file_path,
                                  std::string* error);
 
 }  // namespace app_file_handler_util
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_APP_FILE_HANDLER_UTIL_H_