Replace special IC builtins and stubs in the map's cache by codestubs.

src/type-info.cc

Index: src/type-info.cc
diff --git a/src/type-info.cc b/src/type-info.cc
index 75e915bb846d9b0e8c57f8c29102c2c7526c939f..fb0f45a416791fa8c5e27b93eedaa9e197261f6e 100644
--- a/src/type-info.cc
+++ b/src/type-info.cc
@@ -305,6 +305,15 @@ bool TypeFeedbackOracle::LoadIsBuiltin(Property* expr, Builtins::Name id) {
 }
 
 
+bool TypeFeedbackOracle::LoadIsStub(Property* expr, ICStub* stub) {
+  Handle<Object> object = GetInfo(expr->PropertyFeedbackId());
+  if (!object->IsCode()) return false;
+  Handle<Code> code = Handle<Code>::cast(object);
+  if (!code->is_load_stub()) return false;
+  return stub->Describes(*code);
+}
+
+
 static TypeInfo TypeFromCompareType(CompareIC::State state) {
   switch (state) {
     case CompareIC::UNINITIALIZED: