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

chrome/browser/ui/search/instant_controller.cc

Index: chrome/browser/ui/search/instant_controller.cc
diff --git a/chrome/browser/ui/search/instant_controller.cc b/chrome/browser/ui/search/instant_controller.cc
index fe1cc1bd45c2eada466250960fd566e6f61aa770..4048f97c5c225c26ee0b37afaf72373063878e3f 100644
--- a/chrome/browser/ui/search/instant_controller.cc
+++ b/chrome/browser/ui/search/instant_controller.cc
@@ -1158,23 +1158,14 @@ void InstantController::UpdateMostVisitedItems() {
   std::vector<InstantMostVisitedItem> items;
   instant_service->GetCurrentMostVisitedItems(&items);
 
-  if (overlay_ && GetOverlayContents() &&
-      SearchTabHelper::FromWebContents(overlay_->contents())->
-          UpdateLastKnownMostVisitedItems(items)) {
+  if (overlay_)
     overlay_->SendMostVisitedItems(items);
-  }
 
-  if (ntp_ && ntp_->contents() &&
-      SearchTabHelper::FromWebContents(ntp_->contents())->
-          UpdateLastKnownMostVisitedItems(items)) {
+  if (ntp_)
     ntp_->SendMostVisitedItems(items);
-  }
 
-  if (instant_tab_ && instant_tab_->contents() &&
-      SearchTabHelper::FromWebContents(instant_tab_->contents())->
-          UpdateLastKnownMostVisitedItems(items)) {
+  if (instant_tab_)
     instant_tab_->SendMostVisitedItems(items);
-  }
 
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_INSTANT_SENT_MOST_VISITED_ITEMS,