Remove stl_util's STLDeleteContainerPairSecondPointers.

chrome/browser/background/background_application_list_model.h

Index: chrome/browser/background/background_application_list_model.h
diff --git a/chrome/browser/background/background_application_list_model.h b/chrome/browser/background/background_application_list_model.h
index 282cf45978da2a469465a8e13f41b1380211ced0..26fbc323decb8feda50a8a6aa1fd5ef55d023f57 100644
--- a/chrome/browser/background/background_application_list_model.h
+++ b/chrome/browser/background/background_application_list_model.h
@@ -101,9 +101,6 @@ class BackgroundApplicationListModel : public content::NotificationObserver {
   // represented by the Extension class.
   class Application;
 
-  // Associates extension id strings with Application objects.
-  typedef std::map<std::string, Application*> ApplicationMap;
-
   // Identifies and caches data related to the extension.
   void AssociateApplicationData(const extensions::Extension* extension);
 
@@ -146,7 +143,9 @@ class BackgroundApplicationListModel : public content::NotificationObserver {
   // Refresh the list of background applications and generate notifications.
   void Update();
 
-  ApplicationMap applications_;
+  // Associates extension id strings with Application objects.
+  std::map<std::string, std::unique_ptr<Application>> applications_;
+
   extensions::ExtensionList extensions_;
   base::ObserverList<Observer, true> observers_;
   Profile* profile_;