UMA metrics added for HID detection dialog.

chrome/browser/chromeos/login/wizard_controller.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/types.h>
 
@@ skipping 692 matching lines @@
   // ChromiumOS builds would go though this code path too.
   NetworkHandler::Get()->network_state_handler()->SetCheckPortalList(
       NetworkStateHandler::kDefaultCheckPortalList);
   host_->GetAutoEnrollmentController()->Start();
   host_->PrewarmAuthentication();
   NetworkPortalDetector::Get()->Enable(true);
 }
 
 void WizardController::PerformOOBECompletedActions() {
   StartupUtils::MarkOobeCompleted();
+  UMA_HISTOGRAM_COUNTS_100(
+      "HIDDetection.TimesDialogShownPerOOBECompleted",
+      GetLocalState()->GetInteger(prefs::kTimesHIDDialogShown));

[Mattias Nissler (ping if slow), 2014/05/12 11:10:02]

Would it make sense to clear the pref here? I suspect we don't need the value
ever again after OOBE, so it'd make sense to release the storage.

[merkulova, 2014/05/13 07:18:01]

Done.

 }
 
 void WizardController::SetCurrentScreen(WizardScreen* new_current) {
   SetCurrentScreenSmooth(new_current, false);
 }
 
 void WizardController::ShowCurrentScreen() {
   // ShowCurrentScreen may get called by smooth_show_timer_ even after
   // flow has been switched to sign in screen (ExistingUserController).
   if (!oobe_display_)
@@ skipping 337 matching lines @@
   // cancelled on destruction.
   GetTimezoneProvider()->RequestTimezone(
       position,
       false,  // sensor
       timeout - elapsed,
       base::Bind(&WizardController::OnTimezoneResolved,
                  base::Unretained(this)));
 }
 
 }  // namespace chromeos