Move Object.assign implementation to C++

test/mjsunit/harmony/proxies-object-assign.js

Index: test/mjsunit/harmony/proxies-object-assign.js
diff --git a/test/mjsunit/harmony/proxies-object-assign.js b/test/mjsunit/harmony/proxies-object-assign.js
new file mode 100644
index 0000000000000000000000000000000000000000..154f8c15f680cef95bbef11483d564181d8c0bcc
--- /dev/null
+++ b/test/mjsunit/harmony/proxies-object-assign.js
@@ -0,0 +1,30 @@
+// Copyright 2015 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.
+
+// Flags: --harmony-proxies
+
+var handler = {
+  ownKeys: function(t) { return ["a", "b"]; },
+  getOwnPropertyDescriptor: function(t, p) {
+    return {enumerable: true, configurable: true}
+  },
+  get: function(t, p) {
+    return 1;
+  }
+};
+
+var proxy = new Proxy({}, handler);
+
+var o = {};
+
+Object.assign(o, proxy);
+
+assertEquals({"a": 1, "b": 1}, o);
+
+(function TestStringSources() {
+  var source = "abc";
+  var target = {};
+  Object.assign(target, source);
+  assertEquals({0: "a", 1: "b", 2: "c"}, target);
+})();