Enable user change background image in settings page in Aura build.

chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.h

Index: chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.h
diff --git a/chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.h b/chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.h
new file mode 100644
index 0000000000000000000000000000000000000000..649f978e396d6404ae6d2188f9e4e8a154cacf1b
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+++ b/chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.h
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+// 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_SET_WALLPAPER_OPTIONS_HANDLER2_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SET_WALLPAPER_OPTIONS_HANDLER2_H_
+
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/ui/webui/options2/options_ui2.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace base {
+class DictionaryValue;
+class ListValue;
+}
+
+namespace chromeos {
+namespace options2 {
+
+// ChromeOS user image options page UI handler.
+class SetWallpaperOptionsHandler : public OptionsPageUIHandler{
+ public:
+  SetWallpaperOptionsHandler();
+  virtual ~SetWallpaperOptionsHandler();
+
+  // OptionsPageUIHandler implementation.
+  virtual void GetLocalizedValues(
+      base::DictionaryValue* localized_strings) OVERRIDE;
+
+  // WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  int previous_index_;
+
+  // Sends list of available default images to the page.
+  void SendDefaultImages();
+
+  // Handles page initialized event.
+  void HandlePageInitialized(const base::ListValue* args);
+
+  void HandleSelectImage(const base::ListValue* args);
+
+  // Returns handle to browser window or NULL if it can't be found.
+  gfx::NativeWindow GetBrowserWindow() const;
+
+  base::WeakPtrFactory<SetWallpaperOptionsHandler> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(SetWallpaperOptionsHandler);
+};
+
+}  // namespace options2
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SET_WALLPAPER_OPTIONS_HANDLER2_H_