Refactor and fix feedback

chrome/browser/ui/webui/feedback_ui.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_FEEDBACK_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_FEEDBACK_UI_H_
+
+#include <string>
+
+#include "chrome/browser/ui/webui/html_dialog_ui.h"
+
+class Browser;
+
+namespace browser {
+void ShowHtmlFeedbackView(Browser* browser,
+                          const std::string& description_template,
+                          const std::string& category_tag);
+}  // namespace browser
+
+class FeedbackUI : public HtmlDialogUI {
+ public:
+  explicit FeedbackUI(content::WebContents* contents);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FeedbackUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_FEEDBACK_UI_H_