Implement ES6 Template Literals

src/harmony-templates.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+function GetTemplateCallSite(siteObj, rawStrings) {
+  // TODO(caitp): ensure same template callsite is used for subsequent tag calls
+
+  %AddNamedProperty(siteObj, "raw", %ObjectFreeze(rawStrings),
+      READ_ONLY | DONT_ENUM | DONT_DELETE);
+
+  return %ObjectFreeze(siteObj);
+}