Remove "2" suffixes from options2 code.

chrome/browser/ui/webui/options2/chromeos/wallpaper_thumbnail_source2.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_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_WALLPAPER_THUMBNAIL_SOURCE2_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_WALLPAPER_THUMBNAIL_SOURCE2_H_
-#pragma once
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
-
-namespace chromeos {
-namespace options2 {
-
-// Returns a string consisting of the prefix specified and the index of the
-// image. For example: chrome://wallpaper/default_2.
-std::string GetDefaultWallpaperThumbnailURL(int index);
-
-// Checks if the given URL points to one of the default wallpapers. If it is,
-// returns true and sets |wallpaper_index| to the corresponding index parsed
-// from |url|. For example: chrome://wallpaper/default_2 will set
-// |wallpaper_index| to 2. If not a default wallpaper url, returns false.
-// |url| and |wallpaper_index| must not be NULL.
-bool IsDefaultWallpaperURL(const std::string url, int* wallpaper_index);
-
-// A DataSource for chrome://wallpaper/ URLs.
-class WallpaperThumbnailSource : public ChromeURLDataManager::DataSource {
- public:
-  WallpaperThumbnailSource();
-
-  // ChromeURLDataManager::DataSource implementation.
-  virtual void StartDataRequest(const std::string& path,
-                                bool is_incognito,
-                                int request_id) OVERRIDE;
-  virtual std::string GetMimeType(const std::string&) const OVERRIDE;
-
- private:
-  virtual ~WallpaperThumbnailSource();
-
-  DISALLOW_COPY_AND_ASSIGN(WallpaperThumbnailSource);
-};
-
-}  // namespace options2
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_WALLPAPER_THUMBNAIL_SOURCE2_H_