Use scoped_ptr to document ownership in InstantUnloadHandler.

chrome/browser/instant/instant_service_factory.cc

Index: chrome/browser/instant/instant_service_factory.cc
diff --git a/chrome/browser/instant/instant_service_factory.cc b/chrome/browser/instant/instant_service_factory.cc
index d17a235082e39aebf05c27d7703b4af44c934321..6fdaccf99fa42e18d20820e68251c2b9ce69b818 100644
--- a/chrome/browser/instant/instant_service_factory.cc
+++ b/chrome/browser/instant/instant_service_factory.cc
@@ -18,11 +18,6 @@ InstantServiceFactory* InstantServiceFactory::GetInstance() {
   return Singleton<InstantServiceFactory>::get();
 }
 
-// static
-ProfileKeyedService* InstantServiceFactory::BuildInstanceFor(Profile* profile) {
-  return new InstantService;
-}
-
 InstantServiceFactory::InstantServiceFactory()
     : ProfileKeyedServiceFactory("InstantService",
                                  ProfileDependencyManager::GetInstance()) {
@@ -42,5 +37,5 @@ bool InstantServiceFactory::ServiceIsNULLWhileTesting() const {
 
 ProfileKeyedService* InstantServiceFactory::BuildServiceInstanceFor(
     Profile* profile) const {
-  return BuildInstanceFor(profile);
+  return new InstantService;
 }