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

webkit/fileapi/media/device_media_file_util.cc

 // 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.
 
 #include "webkit/fileapi/media/device_media_file_util.h"
 
 #include "base/file_util.h"
 #include "base/message_loop_proxy.h"
 #include "webkit/fileapi/file_system_operation_context.h"
 #include "webkit/fileapi/file_system_url.h"
 #include "webkit/fileapi/isolated_context.h"
 #include "webkit/fileapi/media/filtering_file_enumerator.h"
 #include "webkit/fileapi/media/media_path_filter.h"
 #include "webkit/fileapi/media/mtp_device_map_service.h"
 
+using base::PlatformFile;
 using base::PlatformFileError;
 using base::PlatformFileInfo;
 
 namespace fileapi {
 
 namespace {
 
 const FilePath::CharType kDeviceMediaFileUtilTempDir[] =
     FILE_PATH_LITERAL("DeviceMediaFileSystem");
 
@@ skipping 172 matching lines @@
       isolated_media_file_system_dir_path, local_path);
   if (!file_created) {
     LOG(WARNING) << "Could not create a temporary file for media snapshot in "
                  << isolated_media_file_system_dir_path.value();
     return base::PLATFORM_FILE_ERROR_FAILED;
   }
   return delegate->CreateSnapshotFile(url.path(), *local_path, file_info);
 }
 
 }  // namespace fileapi