Add chrome://site-tiles-internals/

chrome/browser/ui/webui/ntp_tiles_internals_ui.h

Index: chrome/browser/ui/webui/ntp_tiles_internals_ui.h
diff --git a/chrome/browser/ui/webui/ntp_tiles_internals_ui.h b/chrome/browser/ui/webui/ntp_tiles_internals_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d1a363fcccab9fa034b9c621f70dc4619d5fafe
--- /dev/null
+++ b/chrome/browser/ui/webui/ntp_tiles_internals_ui.h
@@ -0,0 +1,21 @@
+// 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_NTP_TILES_INTERNALS_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_NTP_TILES_INTERNALS_UI_H_
+
+#include "base/macros.h"
+#include "content/public/browser/web_ui_controller.h"
+
+// The implementation for the chrome://ntp-tiles-internals page.
+class NTPTilesInternalsUI : public content::WebUIController {
+ public:
+  explicit NTPTilesInternalsUI(content::WebUI* web_ui);
+  ~NTPTilesInternalsUI() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NTPTilesInternalsUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_NTP_TILES_INTERNALS_UI_H_