[fsp] Introduce chrome://fsp-internals for logging and debugging.

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

Index: chrome/browser/ui/webui/chromeos/fsp_internals_ui.h
diff --git a/chrome/browser/ui/webui/chromeos/fsp_internals_ui.h b/chrome/browser/ui/webui/chromeos/fsp_internals_ui.h
new file mode 100644
index 0000000000000000000000000000000000000000..28475a3f27dbe316ce42788e4d5cdefb709737f0
--- /dev/null
+++ b/chrome/browser/ui/webui/chromeos/fsp_internals_ui.h
@@ -0,0 +1,24 @@
+// Copyright 2014 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_FSP_INTERNALS_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_FSP_INTERNALS_UI_H_
+
+#include "content/public/browser/web_ui_controller.h"
+
+namespace chromeos {
+
+// The WebUI controller for chrome:://fsp-internals, that is used for diagnosing
+// issues of file systems provided via chrome.fileSystemProvider API.
+class FSPInternalsUI : public content::WebUIController {
+ public:
+  explicit FSPInternalsUI(content::WebUI* web_ui);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FSPInternalsUI);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_FSP_INTERNALS_UI_H_