Add storage manager overlay on Settings.

chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h

+// Copyright 2016 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_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_
+
+#include "base/macros.h"
+#include "chrome/browser/ui/webui/options/options_ui.h"
+
+namespace chromeos {
+namespace options {
+
+// Storage manager overlay page UI handler.
+class StorageManagerHandler : public ::options::OptionsPageUIHandler {
+ public:
+  StorageManagerHandler();
+  ~StorageManagerHandler() override;
+
+  // OptionsPageUIHandler implementation.
+  void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
+  void InitializePage() override;
+
+  // WebUIMessageHandler implementation.
+  void RegisterMessages() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StorageManagerHandler);
+};
+
+}  // namespace options
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_STORAGE_MANAGER_HANDLER_H_