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

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

Index: chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h
diff --git a/chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h b/chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..fcf1f4cdcac57bf1516ab09b167ea72a6ca1f976
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+++ b/chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h
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+// 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();
+
+  // WebUIMessageHandler implementation.
+  void RegisterMessages() override;
+
+  // Handler for the 'requestLastScanResult' message.
+  void HandleRequestLastScanResult(const base::ListValue* args);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CleanupActionHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CLEANUP_TOOL_CLEANUP_ACTION_HANDLER_H_