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 49e0bf46e62418de8f10a172c5ef19521e4e3355..c44c3a8b96cc586c740bf05206ed4c4610759350 100644
--- a/chrome/browser/ui/search/instant_controller.cc
+++ b/chrome/browser/ui/search/instant_controller.cc
@@ -1162,23 +1162,14 @@ 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,