Add an API to component_updater that asks to do an update check "now".

chrome/common/chrome_notification_types.h

Index: chrome/common/chrome_notification_types.h
diff --git a/chrome/common/chrome_notification_types.h b/chrome/common/chrome_notification_types.h
index f0cd5006205722649131452f2b758003202d71b0..f88636c60a324e8ba8038f591f3c7295888c5ade 100644
--- a/chrome/common/chrome_notification_types.h
+++ b/chrome/common/chrome_notification_types.h
@@ -696,6 +696,20 @@ enum NotificationType {
   // component and there are no details.
   NOTIFICATION_COMPONENT_UPDATE_READY,
 
+  // Send when the new component has been installed or upgraded successfully.
+  // The source is the id of the component and there are no details.
+  NOTIFICATION_COMPONENT_UPDATE_COMPLETE,
+
+  // Send when the update service cannot find any new versions for
+  // a particular component that was requested.
+  // The source is the id of the component and there are no details.
+  NOTIFICATION_COMPONENT_UPDATE_NOT_UPDATED,
+
+  // Send when the update service found a new version, but failed
+  // to complete the update for a particular component that was requested.
+  // The source is the id of the component and there are no details.
+  NOTIFICATION_COMPONENT_UPDATE_FAILED,
+
   // Desktop Notifications ---------------------------------------------------
 
   // This notification is sent when a balloon is connected to a renderer