Revert 128089 - Initial extension bindings for Media Gallery API.

chrome/renderer/extensions/media_gallery_custom_bindings.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_RENDERER_EXTENSIONS_MEDIA_GALLERY_CUSTOM_BINDINGS_H_
-#define CHROME_RENDERER_EXTENSIONS_MEDIA_GALLERY_CUSTOM_BINDINGS_H_
-#pragma once
-
-#include "chrome/renderer/extensions/chrome_v8_extension.h"
-
-namespace extensions {
-
-// Implements custom bindings for the media gallery API.
-class MediaGalleryCustomBindings : public ChromeV8Extension {
- public:
-  MediaGalleryCustomBindings();
-
- private:
-  static v8::Handle<v8::Value> CreateMediaGalleryObject(
-      const v8::Arguments& args);
-
-  DISALLOW_COPY_AND_ASSIGN(MediaGalleryCustomBindings);
-};
-
-}  // extensions
-
-#endif  // CHROME_RENDERER_EXTENSIONS_MEDIA_GALLERY_CUSTOM_BINDINGS_H_
-