Add chrome://slow for enabling performance tracing for feedback reports.

chrome/browser/ui/webui/chromeos/slow_ui.h

Index: chrome/browser/ui/webui/chromeos/slow_ui.h
diff --git a/chrome/browser/ui/webui/chromeos/slow_ui.h b/chrome/browser/ui/webui/chromeos/slow_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..638356f7019d8451483694edb1c9097286bbee42
--- /dev/null
+++ b/chrome/browser/ui/webui/chromeos/slow_ui.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2013 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_CHROMEOS_SLOW_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_SLOW_UI_H_
+
+#include "content/public/browser/web_ui_controller.h"
+
+namespace chromeos {
+
+// A custom WebUI that allows users to enable and disable performance tracing
+// for feedback reports.
+class SlowUI : public content::WebUIController {
+ public:
+  explicit SlowUI(content::WebUI* web_ui);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SlowUI);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_SLOW_UI_H_
+