Fix fast array literals to ignore prototype chain.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 6dadad60e290e36a87bc6f70fc4bdf0d80bc7b45..67c23efdba87aebd20a703417d900fd968335530 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4514,9 +4514,10 @@ void LCodeGen::EmitDeepCopy(Handle<JSObject> object,
         __ mov(FieldOperand(result, total_offset + 4), Immediate(value_high));
       }
     } else if (elements->IsFixedArray()) {
+      Handle<FixedArray> fast_elements = Handle<FixedArray>::cast(elements);
       for (int i = 0; i < elements_length; i++) {
         int total_offset = elements_offset + FixedArray::OffsetOfElementAt(i);
-        Handle<Object> value = JSObject::GetElement(object, i);
+        Handle<Object> value(fast_elements->get(i));
         if (value->IsJSObject()) {
           Handle<JSObject> value_object = Handle<JSObject>::cast(value);
           __ lea(ecx, Operand(result, *offset));