Added a check in Searchbox::OnMostVisitedChanged() to prevent duplicate notifications regarding mos…

chrome/browser/ui/search/search_tab_helper.cc

Index: chrome/browser/ui/search/search_tab_helper.cc
diff --git a/chrome/browser/ui/search/search_tab_helper.cc b/chrome/browser/ui/search/search_tab_helper.cc
index d191ce9c87921ce9f3d54c8b7c48d7726363a516..f9af25c674d3531a546f71344c671c7e2ee07e73 100644
--- a/chrome/browser/ui/search/search_tab_helper.cc
+++ b/chrome/browser/ui/search/search_tab_helper.cc
@@ -91,15 +91,6 @@ void SearchTabHelper::NavigationEntryUpdated() {
   UpdateMode();
 }
 
-bool SearchTabHelper::UpdateLastKnownMostVisitedItems(
-    const std::vector<InstantMostVisitedItem>& items) {
-  if (chrome::AreMostVisitedItemsEqual(items, last_known_most_visited_items_))
-    return false;
-
-  last_known_most_visited_items_ = items;
-  return true;
-}
-
 void SearchTabHelper::InstantSupportChanged(bool instant_support) {
   if (!is_search_enabled_)
     return;
@@ -123,7 +114,6 @@ void SearchTabHelper::Observe(
     return;
 
   UpdateMode();
-  last_known_most_visited_items_.clear();
 
   // Already determined the instant support state for this page, do not reset
   // the instant support state.