arc: Stop/start ARC++ kiosk app when maintenance session started/finished.

chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc

Index: chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc
diff --git a/chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc b/chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc
index b9435042b0381fb415e516b1c315eb791a2f66f0..d3ffd16064db918c44167e69f43ff64a34c63ccc 100644
--- a/chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc
+++ b/chrome/browser/chromeos/app_mode/arc/arc_kiosk_app_service.cc
@@ -65,8 +65,18 @@ void ArcKioskAppService::OnTaskDestroyed(int32_t task_id) {
   }
 }
 
+void ArcKioskAppService::MaintenanceSessionCreated() {
+  maintenance_session_running_ = true;
+  PreconditionsChanged();
+}
+
+void ArcKioskAppService::MaintenanceSessionFinished() {
+  maintenance_session_running_ = false;
+  PreconditionsChanged();
+}
+
 ArcKioskAppService::ArcKioskAppService(Profile* profile, ArcAppListPrefs* prefs)
-    : profile_(profile), prefs_(prefs) {
+    : profile_(profile), prefs_(prefs), maintenance_session_running_(false) {
   if (prefs_)
     prefs_->AddObserver(this);
   app_manager_ = ArcKioskAppManager::Get();
@@ -94,7 +104,8 @@ ArcKioskAppService::~ArcKioskAppService() {
 void ArcKioskAppService::PreconditionsChanged() {
   app_info_ = prefs_->GetApp(app_id_);
   if (app_info_ && app_info_->ready &&
-      profile_->GetPrefs()->GetBoolean(prefs::kArcPolicyCompliant)) {
+      profile_->GetPrefs()->GetBoolean(prefs::kArcPolicyCompliant) &&
+      !maintenance_session_running_) {
     if (!app_launcher_)
       app_launcher_.reset(new ArcKioskAppLauncher(profile_, prefs_, app_id_));
   } else if (task_id_ != -1) {