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

webkit/fileapi/media/device_media_file_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 WEBKIT_FILEAPI_MEDIA_DEVICE_MEDIA_FILE_UTIL_H_
 #define WEBKIT_FILEAPI_MEDIA_DEVICE_MEDIA_FILE_UTIL_H_
 
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
@@ skipping 34 matching lines @@
       bool recursive) OVERRIDE;
   virtual base::PlatformFileError GetFileInfo(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       base::PlatformFileInfo* file_info,
       FilePath* platform_path) OVERRIDE;
   virtual scoped_ptr<AbstractFileEnumerator> CreateFileEnumerator(
       FileSystemOperationContext* context,
       const FileSystemURL& root_url,
       bool recursive) OVERRIDE;
-  virtual PlatformFileError GetLocalFilePath(
+  virtual base::PlatformFileError GetLocalFilePath(
       FileSystemOperationContext* context,
       const FileSystemURL& file_system_url,
       FilePath* local_file_path) OVERRIDE;
   virtual base::PlatformFileError Touch(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
       const base::Time& last_access_time,
       const base::Time& last_modified_time) OVERRIDE;
   virtual base::PlatformFileError Truncate(
       FileSystemOperationContext* context,
@@ skipping 27 matching lines @@
  private:
   // Profile path
   const FilePath profile_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMediaFileUtil);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_MEDIA_DEVICE_MEDIA_FILE_UTIL_H_