Make an AddAll in ListModel.

chrome/browser/ui/app_list/apps_model_builder.cc

Index: chrome/browser/ui/app_list/apps_model_builder.cc
diff --git a/chrome/browser/ui/app_list/apps_model_builder.cc b/chrome/browser/ui/app_list/apps_model_builder.cc
index b662b4537f18f1e81c044f4cd06ae4d4126915d1..6daf274792b50f4a943d1ca1a5a67040bc99afae 100644
--- a/chrome/browser/ui/app_list/apps_model_builder.cc
+++ b/chrome/browser/ui/app_list/apps_model_builder.cc
@@ -189,8 +189,11 @@ void AppsModelBuilder::PopulateApps() {
   service->extension_prefs()->extension_sorting()->FixNTPOrdinalCollisions();
   std::sort(apps.begin(), apps.end(), &AppPrecedes);
 
-  for (size_t i = 0; i < apps.size(); ++i)
-    model_->Add(apps[i]);
+  ScopedVector<app_list::AppListItemModel> items;
+  items.assign(apps.begin(), apps.end());
+
+  model_->AddAll(items.Pass());
+
 }
 
 void AppsModelBuilder::ResortApps() {