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 25150346fcf29ac0df6440df7526ad476c6c87c4..0f964b8fde59ea364e0e6045a5cc3b9c7f74e9e2 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(false);
 }
 
-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(true);
-  last_known_most_visited_items_.clear();
 
   // Already determined the instant support state for this page, do not reset
   // the instant support state.