Add KeepAliveStateObserver, add the Restart option

chrome/browser/ui/app_list/app_list_shower_views.cc

Index: chrome/browser/ui/app_list/app_list_shower_views.cc
diff --git a/chrome/browser/ui/app_list/app_list_shower_views.cc b/chrome/browser/ui/app_list/app_list_shower_views.cc
index 82d55bf5f426e3f896f81b1f017319eed67286f0..d38f2469b0b8bf935cb7048457cd88dd502e0480 100644
--- a/chrome/browser/ui/app_list/app_list_shower_views.cc
+++ b/chrome/browser/ui/app_list/app_list_shower_views.cc
@@ -30,7 +30,8 @@ AppListShower::~AppListShower() {
 
 void AppListShower::ShowForCurrentProfile() {
   DCHECK(HasView());
-  keep_alive_.reset(new ScopedKeepAlive(keep_alive::Origin::APP_LIST_SHOWER));
+  keep_alive_.reset(new ScopedKeepAlive(keep_alive::Origin::APP_LIST_SHOWER,
+                                        keep_alive::RestartOption::DISABLED));
 
   // If the app list is already displaying |profile| just activate it (in case
   // we have lost focus).