Also support smi in load-ICs.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 819cb4bb5bf4a113c21620b67aac9f90b7c97952..33252e8ac2dfcbb208431dbf72fa29a9295c11b4 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -193,11 +193,11 @@ class IC {
     UNREACHABLE();
     return Handle<Code>::null();
   }
-  void UpdateMonomorphicIC(Handle<HeapObject> receiver,
+  void UpdateMonomorphicIC(Handle<Object> receiver,
                            Handle<Code> handler,
                            Handle<String> name);
 
-  bool UpdatePolymorphicIC(Handle<HeapObject> receiver,
+  bool UpdatePolymorphicIC(Handle<Object> receiver,
                            Handle<String> name,
                            Handle<Code> code);