Blink-in-JS: Support partial interfaces in private scripts

Source/core/testing/PartialPrivateScriptTest.js

+// Copyright 2014 The Chromium 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";
+
+installClass("PrivateScriptTest", function(global, PrivateScriptTestPrototype) {
+
+    PrivateScriptTestPrototype.addIntegerInPartial = function(value1, value2) {
+        return value1 + value2;
+    }
+
+    PrivateScriptTestPrototype.addInteger2InPartial = function(value1, value2) {
+        // addValue_ is a method defined in PrivateScriptTest.js.
+        // Partial interfaces should be able to use methods defined in the base interface.
+        return this.addValues_(value1, value2);
+    }
+
+    Object.defineProperty(PrivateScriptTestPrototype, "stringAttributeInPartial", {
+        get: function() { return this.m_stringAttributeInPartial; },
+        set: function(value) { this.m_stringAttributeInPartial = value; }
+    });
+
+});