[d8] Use ValueSerializer for postMessage (instead of ad-hoc serializer)

test/mjsunit/regress/regress-crbug-514081.js

 // 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.
 
 if (this.Worker) {
   var __v_7 = new Worker('onmessage = function() {};');
+  var e;
   try {
     var ab = new ArrayBuffer(2147483648);
-    // If creating the ArrayBuffer succeeded, then postMessage should fail.
-    assertThrows(function() { __v_7.postMessage(ab); });
+    try {
+      __v_7.postMessage(ab);
+    } catch (e) {
+      // postMessage failed, should be a DataCloneError message.
+      assertContains('cloned', e.message);
+    }
   } catch (e) {
     // Creating the ArrayBuffer failed.
     assertInstanceof(e, RangeError);
   }
 }