[MD Feedback] Add basic chrome://feedback WebUI.

chrome/browser/ui/webui/md_feedback/md_feedback_ui.h

Index: chrome/browser/ui/webui/md_feedback/md_feedback_ui.h
diff --git a/chrome/browser/ui/webui/md_feedback/md_feedback_ui.h b/chrome/browser/ui/webui/md_feedback/md_feedback_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..f9d7d9e285ce7c6d346507eebe4b6e6b66ec5045
--- /dev/null
+++ b/chrome/browser/ui/webui/md_feedback/md_feedback_ui.h
@@ -0,0 +1,20 @@
+// 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_MD_FEEDBACK_MD_FEEDBACK_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_MD_FEEDBACK_MD_FEEDBACK_UI_H_
+
+#include "base/macros.h"
+#include "content/public/browser/web_ui_controller.h"
+
+// The WebUI for chrome://feedback.
+class MdFeedbackUI : public content::WebUIController {
+ public:
+  explicit MdFeedbackUI(content::WebUI* web_ui);
+  ~MdFeedbackUI() override;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MdFeedbackUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_MD_FEEDBACK_MD_FEEDBACK_UI_H_