keyboard: Update the visibility after tab-switch.

chrome/common/notification_type.h

Index: chrome/common/notification_type.h
diff --git a/chrome/common/notification_type.h b/chrome/common/notification_type.h
index fadff2f85502f9a6681b9b2bc1a71a049d699146..ddfe7b3760bdef9bef902c0025ff687a331a4c60 100644
--- a/chrome/common/notification_type.h
+++ b/chrome/common/notification_type.h
@@ -519,9 +519,10 @@ class NotificationType {
     // guaranteed to be valid after the notification.
     WEB_CACHE_STATS_OBSERVED,
 
-    // The focused element inside a page has changed.  The source is the render
-    // view host for the page.  The details are a Details<const bool> that
-    // indicates whether or not an editable node was focused.
+    // The focused element inside a page has changed.  The source is the
+    // TabContents containing the render view host for the page. The details is
+    // a Details<const bool> that indicates whether or not an editable node was
+    // focused.
     FOCUS_CHANGED_IN_PAGE,
 
     // Notification posted from ExecuteJavascriptInWebFrameNotifyResult. The