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

chrome/common/chrome_notification_types.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 
 #include "build/build_config.h"
 #include "content/public/browser/notification_types.h"
 
@@ skipping 678 matching lines @@
   // Sent when there is a new version of a registered component. After
   // the notification is send the component will be downloaded. The source
   // is the id of the component and there are no details.
   NOTIFICATION_COMPONENT_UPDATE_FOUND,
 
   // Send when the new component has been downloaded and an installation
   // or upgrade is about to be attempted. The source is the id of the
   // 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
   // process to render the balloon contents.  The source is a
   // Source<BalloonHost> with a pointer to the the balloon.  A
   // NOTIFY_BALLOON_DISCONNECTED is guaranteed before the source pointer
   // becomes junk. No details expected.
   NOTIFICATION_NOTIFY_BALLOON_CONNECTED,
 
   // This message is sent after a balloon is disconnected from the renderer
@@ skipping 528 matching lines @@
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 
 #endif  // CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_