chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/file_manager/filesystem_api_util.h

 // Copyright 2014 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.
 //
 // The file contains utility functions to implement chrome.fileSystem API for
 // file paths that do not directly map to host machine's file system path, such
 // as Google Drive or virtual volumes provided by fileSystemProvider extensions.
 
 #ifndef CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "storage/common/fileapi/file_system_types.h"
 
 class Profile;
 
 namespace base {
 class FilePath;
 }  // namespace base
 
-namespace storage {
-class FileSystemURL;
-}  // namespace storage
-
 namespace file_manager {
 namespace util {
 
 // Obtains whether |type| is non-native file system or not.
 bool IsNonNativeFileSystemType(storage::FileSystemType type);
 
 // Checks whether the given |path| points to a non-local filesystem that
 // requires special handling.
 bool IsUnderNonNativeLocalPath(Profile* profile, const base::FilePath& path);
 
@@ skipping 16 matching lines @@
 // |callback| whether it succeeded.
 void PrepareNonNativeLocalFileForWritableApp(
     Profile* profile,
     const base::FilePath& path,
     const base::Callback<void(bool)>& callback);
 
 }  // namespace util
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_FILESYSTEM_API_UTIL_H_