Build fast literals in hydrogen.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index b24a4cd1d8b541bb95561e2f684122ccbc9be456..2a51a7b51cccb5a15b32ee438f702b0829cede46 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -308,6 +308,14 @@ Handle<JSObject> Copy(Handle<JSObject> obj) {
 }
 
 
+Handle<JSObject> DeepCopy(Handle<JSObject> obj) {
+  Isolate* isolate = obj->GetIsolate();
+  CALL_HEAP_FUNCTION(isolate,
+                     obj->DeepCopy(isolate),
+                     JSObject);
+}
+
+
 Handle<Object> SetAccessor(Handle<JSObject> obj, Handle<AccessorInfo> info) {
   CALL_HEAP_FUNCTION(obj->GetIsolate(), obj->DefineAccessor(*info), Object);
 }