Structured cloning: improve DataCloneError reporting.

LayoutTests/fast/canvas/webgl/script-tests/arraybuffer-transfer-of-control.js

 window.jsTestIsAsync = true;
 
 description('Test transfer of control semantics for ArrayBuffers.');
 window.testsComplete = 0;
 
 var arraySize = 40;
 var arrayOffset = 8;
 var arrayEffectiveSize = arraySize - arrayOffset;
 
 var basicBufferTypes =
@@ skipping 13 matching lines @@
 [
     ["Int32", Int32Array, 4],
     ["Uint32", Uint32Array, 4],
     ["Int8", Int8Array, 1],
     ["Uint8", Uint8Array, 1],
     ["Uint8Clamped", Uint8ClampedArray, 1],
     ["Int16", Int16Array, 2],
     ["Uint16", Uint16Array, 2],
     ["Float32", Float32Array, 4],
     ["Float64", Float64Array, 8],
-    ["DataView", DataView, 1] 
+    ["DataView", DataView, 1]
 ];
 
 function isTypedArray(view)
 {
     for (var i = 0; i < basicBufferTypes.length; ++i) {
         var bufferType = basicBufferTypes[i];
         if (view instanceof bufferType[1]) {
             return true;
         }
     }
     return false;
 }
 
 function isDataView(view)
 {
     return (view instanceof DataView);
 }
 
 function isArrayBuffer(buffer)
 {
     return (buffer instanceof ArrayBuffer);
 }
 
+function isDataCloneError(e)
+{
+    return (e.name === "DataCloneError");
+}
+
 function assertBufferClosed(testName, buffer)
 {
     if (buffer === null) {
         return true;
     }
     if (!isArrayBuffer(buffer)) {
         testFailed(testName + ": not an array buffer (" + buffer + ")");
         return false;
     }
     if (buffer.byteLength !== 0 || !(buffer.byteLength === 0)) {
@@ skipping 182 matching lines @@
         return false;
     }
     return true;
 }
 
 function wrapFailSend(testName, message, xfer)
 {
     try {
         window.postMessage(message, '*', xfer);
     } catch (e) {
+        if (!isDataCloneError(e)) {
+            testFailed(testName + ": expected postMessage to throw DataCloneError but it didn't.");
+            return false;
+        }
         return true;
     }
     testFailed(testName + ": expected postMessage to fail but it didn't.");
     return false;
 }
 
 var testList = [{
     name: "sanity check",
     send: function (name) { wrapSend(name, [], []); },
     test: function (name, e) { return true; }
@@ skipping 177 matching lines @@
     }
     doneTest();
 }
 
 window.addEventListener('message', windowHandleMessage);
 window.testsComplete = -1;
 doneTest();
 
 successfullyParsed = true;