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diff --git a/deps/v8/test/webkit/class-syntax-default-constructor.js b/deps/v8/test/webkit/class-syntax-default-constructor.js
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+++ b/deps/v8/test/webkit/class-syntax-default-constructor.js
@@ -0,0 +1,42 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-sloppy
+
+description('Tests for ES6 class syntax default constructor');
+
+class A { };
+class B extends A { };
+
+shouldBeTrue('new A instanceof A');
+shouldThrow('A()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
+shouldBeTrue('A.prototype.constructor instanceof Function');
+shouldBe('A.prototype.constructor.name', '"A"');
+shouldBeTrue('new B instanceof A; new B instanceof A');
+shouldThrow('B()', '"TypeError: Class constructors cannot be invoked without \'new\'"');
+shouldBe('B.prototype.constructor.name', '"B"');
+shouldBeTrue('A !== B');
+shouldBeTrue('A.prototype.constructor !== B.prototype.constructor');
+shouldBe('new (class extends (class { constructor(a, b) { return [a, b]; } }) {})(1, 2)', '[1, 2]');
+
+var successfullyParsed = true;