Revert "Revert 202751 "Change RulesRegistryService to use ProfileKeyedAPI.""

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 a43dfb1e4404d2fb06f7c9be29038cfae35763c0..b3ed09f8901cce2b36c184c4da81a701345a531d 100644
--- a/chrome/browser/extensions/test_extension_system.cc
+++ b/chrome/browser/extensions/test_extension_system.cc
@@ -148,10 +148,6 @@ EventRouter* TestExtensionSystem::event_router() {
   return NULL;
 }
 
-RulesRegistryService* TestExtensionSystem::rules_registry_service() {
-  return NULL;
-}
-
 ApiResourceManager<SerialConnection>*
 TestExtensionSystem::serial_connection_manager() {
   return NULL;