Move ownership of AppSorting from ExtensionPrefs to ExtensionSystem

chrome/browser/extensions/test_extension_system.cc

Index: chrome/browser/extensions/test_extension_system.cc
diff --git a/chrome/browser/extensions/test_extension_system.cc b/chrome/browser/extensions/test_extension_system.cc
index b1d023cf23256695a845731fef2f43053074a5db..472d85e0164806f7129c119d9d965d1f2b708555 100644
--- a/chrome/browser/extensions/test_extension_system.cc
+++ b/chrome/browser/extensions/test_extension_system.cc
@@ -58,7 +58,6 @@ scoped_ptr<ExtensionPrefs> TestExtensionSystem::CreateExtensionPrefs(
   return make_scoped_ptr(ExtensionPrefs::Create(
       profile_->GetPrefs(), install_directory,
       ExtensionPrefValueMapFactory::GetForBrowserContext(profile_),
-      ExtensionsBrowserClient::Get()->CreateAppSorting(profile_).Pass(),
       extensions_disabled, std::vector<ExtensionPrefsObserver*>()));
 }
 
@@ -122,6 +121,10 @@ QuotaService* TestExtensionSystem::quota_service() {
   return quota_service_.get();
 }
 
+AppSorting* TestExtensionSystem::app_sorting() {
+  return nullptr;
+}
+
 const OneShotEvent& TestExtensionSystem::ready() const {
   return ready_;
 }