Add GetProperty/GetElement to JSReceiver and use it where possible

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 976798b271bce0ebad8253f9a3e2d41f392a904b..74a204d8a8802307042a1f1acad71bc03b54d4d3 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -2814,8 +2814,7 @@ RUNTIME_FUNCTION(Runtime_LoadPropertyWithInterceptor) {
   Handle<Object> result;
   LookupIterator it(receiver, name, holder);
   // TODO(conradw): Investigate strong mode semantics for this.
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
-                                     JSObject::GetProperty(&it));
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::GetProperty(&it));
 
   if (it.IsFound()) return *result;