Remove TopSites notification in favor of Observers

chrome/browser/chrome_notification_types.h

Index: chrome/browser/chrome_notification_types.h
diff --git a/chrome/browser/chrome_notification_types.h b/chrome/browser/chrome_notification_types.h
index 1028207ae97b9e5b7f5508db94354e5c763d90d2..38ed1b7969944fd6c2f105378804a71d9df887c4 100644
--- a/chrome/browser/chrome_notification_types.h
+++ b/chrome/browser/chrome_notification_types.h
@@ -274,17 +274,6 @@ enum NotificationType {
   // The details are none and the source is a Profile*.
   NOTIFICATION_PROFILE_URL_REQUEST_CONTEXT_GETTER_INITIALIZED,
 
-  // TopSites ----------------------------------------------------------------
-
-  // Sent by TopSites when it finishes loading. The source is the profile the
-  // details the TopSites.
-  NOTIFICATION_TOP_SITES_LOADED,
-
-  // Sent by TopSites when the either one of the most visited urls changed, or
-  // one of the images changes. The source is the TopSites, the details not
-  // used.
-  NOTIFICATION_TOP_SITES_CHANGED,
-
   // Task Manager ------------------------------------------------------------
 
   // Sent when a renderer process is notified of new v8 heap statistics. The