Cleanup: Remove using statements from webkit/fileapi header files.

webkit/fileapi/isolated_mount_point_provider.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 WEBKIT_FILEAPI_ISOLATED_MOUNT_POINT_PROVIDER_H_
 #define WEBKIT_FILEAPI_ISOLATED_MOUNT_POINT_PROVIDER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
 #include "webkit/fileapi/media/mtp_device_file_system_config.h"
 
 namespace fileapi {
 
 class DraggedFileUtil;
 class IsolatedContext;
 class IsolatedFileUtil;
 class MediaPathFilter;
 class NativeMediaFileUtil;
 
 #if defined(SUPPORT_MTP_DEVICE_FILESYSTEM)
 class DeviceMediaFileUtil;
 #endif
 
 class IsolatedMountPointProvider : public FileSystemMountPointProvider {
  public:
-  using FileSystemMountPointProvider::ValidateFileSystemCallback;
-  using FileSystemMountPointProvider::DeleteFileSystemCallback;
-
   explicit IsolatedMountPointProvider(const FilePath& profile_path);
   virtual ~IsolatedMountPointProvider();
 
   // FileSystemMountPointProvider implementation.
   virtual void ValidateFileSystemRoot(
       const GURL& origin_url,
       FileSystemType type,
       bool create,
       const ValidateFileSystemCallback& callback) OVERRIDE;
   virtual FilePath GetFileSystemRootPathOnFileThread(
@@ skipping 35 matching lines @@
   scoped_ptr<NativeMediaFileUtil> native_media_file_util_;
 
 #if defined(SUPPORT_MTP_DEVICE_FILESYSTEM)
   scoped_ptr<DeviceMediaFileUtil> device_media_file_util_;
 #endif
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_ISOLATED_MOUNT_POINT_PROVIDER_H_