Redirect to the enterprise enrollment screen during remora and shark pairing

chrome/browser/chromeos/login/screens/host_pairing_screen.cc

Index: chrome/browser/chromeos/login/screens/host_pairing_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/host_pairing_screen.cc b/chrome/browser/chromeos/login/screens/host_pairing_screen.cc
index 075297391b3f62223d60fdbed105b71056f96a0f..f02a213d7c293cee6178d794c98d6853aa07ab1f 100644
--- a/chrome/browser/chromeos/login/screens/host_pairing_screen.cc
+++ b/chrome/browser/chromeos/login/screens/host_pairing_screen.cc
@@ -20,6 +20,7 @@ HostPairingScreen::HostPairingScreen(
     : WizardScreen(observer),
       actor_(actor),
       controller_(controller),
+      observing_controller_(true),
       current_stage_(HostPairingController::STAGE_NONE) {
   actor_->SetDelegate(this);
   controller_->AddObserver(this);
@@ -28,7 +29,8 @@ HostPairingScreen::HostPairingScreen(
 HostPairingScreen::~HostPairingScreen() {
   if (actor_)
     actor_->SetDelegate(NULL);
-  controller_->RemoveObserver(this);
+  if (observing_controller_)
+    controller_->RemoveObserver(this);
 }
 
 void HostPairingScreen::CommitContextChanges() {
@@ -63,6 +65,10 @@ void HostPairingScreen::PairingStageChanged(Stage new_stage) {
 
   std::string desired_page;
   switch (new_stage) {
+    case HostPairingController::STAGE_NONE:
+    case HostPairingController::STAGE_INITIALIZATION_ERROR: {
+      break;
+    }
     case HostPairingController::STAGE_WAITING_FOR_CONTROLLER:
     case HostPairingController::STAGE_WAITING_FOR_CONTROLLER_AFTER_UPDATE: {
       desired_page = kPageWelcome;
@@ -98,11 +104,7 @@ void HostPairingScreen::PairingStageChanged(Stage new_stage) {
       break;
     }
     case HostPairingController::STAGE_FINISHED: {
-      get_screen_observer()->OnExit(WizardController::HOST_PAIRING_FINISHED);
-      break;
-    }
-    default: {
-      NOTREACHED();
+      // This page is closed in EnrollHost.
       break;
     }
   }
@@ -122,9 +124,11 @@ void HostPairingScreen::ConfigureHost(bool accepted_eula,
 }
 
 void HostPairingScreen::EnrollHost(const std::string& auth_token) {
-  // TODO(zork,achuith): Enroll device, send error on error.
-  // (http://crbug.com/374990)
-  controller_->SetEnrollmentComplete(true);
+  DCHECK(observing_controller_);
+  observing_controller_ = false;
+  controller_->RemoveObserver(this);
+  WizardController::default_controller()->OnEnrollmentAuthTokenReceived(
+      auth_token);
 }
 
 void HostPairingScreen::OnActorDestroyed(HostPairingScreenActor* actor) {