Added UMA metrics for ChromeOS first-run UI.

chrome/browser/chromeos/first_run/first_run_controller.h

 // Copyright 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_CHROMEOS_FIRST_RUN_FIRST_RUN_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_FIRST_RUN_FIRST_RUN_CONTROLLER_H_
 
 #include <string>
 #include <vector>
 
 #include "ash/first_run/first_run_helper.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
 #include "chrome/browser/ui/webui/chromeos/first_run/first_run_actor.h"
 
 class Profile;
 
 namespace content {
 class WebContents;
 }
 
 namespace chromeos {
 
@@ skipping 60 matching lines @@
 
   // Profile used for webui and help app.
   Profile* user_profile_;
 
   // The work that should be made after actor has been finalized.
   base::Closure on_actor_finalized_;
 
   // Web contents of WebUI.
   content::WebContents* web_contents_for_tests_;
 
+  // Time when tutorial was started.
+  base::Time start_time_;
+
   DISALLOW_COPY_AND_ASSIGN(FirstRunController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FIRST_RUN_FIRST_RUN_CONTROLLER_H_