Make an AddAll in ListModel.

chrome/browser/ui/app_list/apps_model_builder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/app_list/apps_model_builder.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/prefs/pref_service.h"
@@ skipping 171 matching lines @@
   AddApps(service->extensions(), &apps);
   AddApps(service->disabled_extensions(), &apps);
   AddApps(service->terminated_extensions(), &apps);
 
   if (apps.empty())
     return;
 
   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() {
   // Scan app items in |model_| and put the apps that do not have valid ordinals
   // into |invalid_ordinal_apps|. This is needed to handle uninstalling a
   // terminated app case, where there is no unload notification and uninstall
   // notification comes in after the app's ordinals are cleared.
   // See http://crbug.com/256749.
   Apps apps;
   Apps invalid_ordinal_apps;
@@ skipping 111 matching lines @@
 
   ExtensionAppItem* prev = target_index > 0 ? GetAppAt(target_index - 1) : NULL;
   ExtensionAppItem* next = target_index + 1 < model_->item_count() ?
       GetAppAt(target_index + 1) : NULL;
   GetAppAt(target_index)->Move(prev, next);
 }
 
 void AppsModelBuilder::ListItemsChanged(size_t start, size_t count) {
   NOTREACHED();
 }