ExtendStorageStub added, it is aimed for extending objects backing store when it runs out of space.

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 50c9d72605e30231eca4901f00108aaac8ca84d9..f0b3e56b036659b05ecde363473bd011df9e4ef7 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -2074,30 +2074,6 @@ RUNTIME_FUNCTION(StoreIC_MissFromStubFailure) {
 }
 
 
-// Extend storage is called in a store inline cache when
-// it is necessary to extend the properties array of a
-// JSObject.
-RUNTIME_FUNCTION(SharedStoreIC_ExtendStorage) {
-  TimerEventScope<TimerEventIcMiss> timer(isolate);
-  HandleScope shs(isolate);
-  DCHECK(args.length() == 3);
-
-  // Convert the parameters
-  Handle<JSObject> object = args.at<JSObject>(0);
-  Handle<Map> transition = args.at<Map>(1);
-  Handle<Object> value = args.at<Object>(2);
-
-  // Check the object has run out out property space.
-  DCHECK(object->HasFastProperties());
-  DCHECK(object->map()->unused_property_fields() == 0);
-
-  JSObject::MigrateToNewProperty(object, transition, value);
-
-  // Return the stored value.
-  return *value;
-}
-
-
 // Used from ic-<arch>.cc.
 RUNTIME_FUNCTION(KeyedStoreIC_Miss) {
   TimerEventScope<TimerEventIcMiss> timer(isolate);