Cleanup Tool WebUI: Add HTML content and styling with dummy JS

chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h

+// Copyright 2017 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_CLEANUP_TOOL_CLEANUP_ACTION_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_CLEANUP_TOOL_CLEANUP_ACTION_HANDLER_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+// The handler for Javascript messages related to the "Chrome Cleanup" view.
+class CleanupActionHandler : public content::WebUIMessageHandler {
+ public:
+  CleanupActionHandler();
+  ~CleanupActionHandler() override;
+
+  // WebUIMessageHandler implementation.
+  void RegisterMessages() override;
+
+ private:
+  void HandleRequestLastScanResult(const base::ListValue* args);
+
+  DISALLOW_COPY_AND_ASSIGN(CleanupActionHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CLEANUP_TOOL_CLEANUP_ACTION_HANDLER_H_