Avoid calling inherited setters when creating object literals and their boilerplates.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index 68c61b5cdb168aae904786d229da17e49046bf98..461c3f5fab9b1280bfad66ceb52c831d8d2ad469 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -280,13 +280,13 @@ Handle<Object> ForceDeleteProperty(Handle<JSObject> object,
 }
 
 
-Handle<Object> IgnoreAttributesAndSetLocalProperty(
+Handle<Object> SetLocalPropertyIgnoreAttributes(
     Handle<JSObject> object,
     Handle<String> key,
     Handle<Object> value,
     PropertyAttributes attributes) {
   CALL_HEAP_FUNCTION(object->
-      IgnoreAttributesAndSetLocalProperty(*key, *value, attributes), Object);
+      SetLocalPropertyIgnoreAttributes(*key, *value, attributes), Object);
 }
 
 
@@ -422,6 +422,15 @@ Handle<Object> SetElement(Handle<JSObject> object,
 }
 
 
+Handle<Object> SetOwnElement(Handle<JSObject> object,
+                             uint32_t index,
+                             Handle<Object> value) {
+  ASSERT(!object->HasPixelElements());
+  ASSERT(!object->HasExternalArrayElements());
+  CALL_HEAP_FUNCTION(object->SetElement(index, *value, false), Object);
+}
+
+
 Handle<JSObject> Copy(Handle<JSObject> obj) {
   CALL_HEAP_FUNCTION(Heap::CopyJSObject(*obj), JSObject);
 }