UMA: How often are different network error screens encountered during OOBE

chrome/browser/chromeos/login/supervised/supervised_user_creation_screen.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/supervised/supervised_user_creation_screen.h"
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "base/rand_util.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/camera_detector.h"
+#include "chrome/browser/chromeos/login/error_screens_histogram_helper.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/screen_manager.h"
 #include "chrome/browser/chromeos/login/screens/error_screen.h"
 #include "chrome/browser/chromeos/login/screens/screen_observer.h"
 #include "chrome/browser/chromeos/login/signin_specifics.h"
 #include "chrome/browser/chromeos/login/supervised/supervised_user_authentication.h"
 #include "chrome/browser/chromeos/login/supervised/supervised_user_creation_controller.h"
 #include "chrome/browser/chromeos/login/supervised/supervised_user_creation_controller_new.h"
 #include "chrome/browser/chromeos/login/users/avatar/user_image_manager.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
@@ skipping 75 matching lines @@
     ScreenObserver* observer,
     SupervisedUserCreationScreenHandler* actor)
     : WizardScreen(observer),
       weak_factory_(this),
       actor_(actor),
       on_error_screen_(false),
       last_page_(kNameOfIntroScreen),
       sync_service_(NULL),
       image_decoder_(NULL),
       apply_photo_after_decoding_(false),
-      selected_image_(0) {
+      selected_image_(0),
+      histogram_helper_(new ErrorScreensHistogramHelper("Supervised")) {
   DCHECK(actor_);
   if (actor_)
     actor_->SetDelegate(this);
 }
 
 SupervisedUserCreationScreen::~SupervisedUserCreationScreen() {
   CameraPresenceNotifier::GetInstance()->RemoveObserver(this);
   if (sync_service_)
     sync_service_->RemoveObserver(this);
   if (actor_)
@@ skipping 16 matching lines @@
     // removed once we have screens reworked.
     if (on_error_screen_)
       actor_->ShowPage(last_page_);
     else
       actor_->ShowIntroPage();
   }
 
   if (!on_error_screen_)
     NetworkPortalDetector::Get()->AddAndFireObserver(this);
   on_error_screen_ = false;
+  histogram_helper_->OnScreenShow();
 }
 
 void SupervisedUserCreationScreen::OnPageSelected(const std::string& page) {
   last_page_ = page;
 }
 
 void SupervisedUserCreationScreen::OnPortalDetectionCompleted(
     const NetworkState* network,
     const NetworkPortalDetector::CaptivePortalState& state)  {
   if (state.status == NetworkPortalDetector::CAPTIVE_PORTAL_STATUS_ONLINE) {
     get_screen_observer()->HideErrorScreen(this);
+    histogram_helper_->OnErrorHide();
   } else {
     on_error_screen_ = true;
     ErrorScreen* screen = get_screen_observer()->GetErrorScreen();
     ConfigureErrorScreen(screen, network, state.status);
     screen->SetUIState(ErrorScreen::UI_STATE_SUPERVISED);
     get_screen_observer()->ShowErrorScreen();
+    histogram_helper_->OnErrorShow(screen->GetErrorState());
   }
 }
 
 void SupervisedUserCreationScreen::ShowManagerInconsistentStateErrorScreen() {
   if (!actor_)
     return;
   actor_->ShowErrorPage(
       l10n_util::GetStringUTF16(
           IDS_CREATE_SUPERVISED_USER_MANAGER_INCONSISTENT_STATE_TITLE),
       l10n_util::GetStringUTF16(
@@ skipping 431 matching lines @@
     selected_image_ = user_manager::User::USER_IMAGE_EXTERNAL;
   } else {
     NOTREACHED() << "Unexpected image type: " << image_type;
   }
 }
 
 void SupervisedUserCreationScreen::OnImageAccepted() {
 }
 
 }  // namespace chromeos