Show an error update engine status for all unknown states.

chrome/browser/chromeos/update_observer.cc

Index: chrome/browser/chromeos/update_observer.cc
diff --git a/chrome/browser/chromeos/update_observer.cc b/chrome/browser/chromeos/update_observer.cc
index ac1af569746d0b1debbd282cfd2f5cb00dd74f5e..56c919e5322b1f68ca0aa8b8cf47d33687c0e95e 100644
--- a/chrome/browser/chromeos/update_observer.cc
+++ b/chrome/browser/chromeos/update_observer.cc
@@ -24,9 +24,6 @@ UpdateObserver::~UpdateObserver() {
 
 void UpdateObserver::Changed(UpdateLibrary* object) {
   switch (object->status().status) {
-    case UPDATE_STATUS_ERROR:
-      notification_.Show(l10n_util::GetStringUTF16(IDS_UPDATE_ERROR), true);
-      break;
     case UPDATE_STATUS_IDLE:
     case UPDATE_STATUS_CHECKING_FOR_UPDATE:
       // Do nothing in these cases, we don't want to notify the user of the
@@ -59,8 +56,10 @@ void UpdateObserver::Changed(UpdateLibrary* object) {
     case UPDATE_STATUS_UPDATED_NEED_REBOOT:
       notification_.Show(l10n_util::GetStringUTF16(IDS_UPDATE_COMPLETED), true);
       break;
+    default:
+      notification_.Show(l10n_util::GetStringUTF16(IDS_UPDATE_ERROR), true);
+      break;
   }
 }
 
 }  // namespace chromeos
-