Get rid of custom code for Document::createTouchList()

LayoutTests/fast/events/touch/script-tests/document-create-touch-list.js

 description("This tests support for the document.createTouchList API.");
 
 shouldBeTrue('"createTouchList" in document');
 
 // Test createTouchList with no arguments.
 var touchList = document.createTouchList();
 shouldBeNonNull("touchList");
 shouldBe("touchList.length", "0");
 shouldBeNull("touchList.item(0)");
 shouldBeNull("touchList.item(1)");
@@ skipping 22 matching lines @@
 
     document.body.dispatchEvent(evt);
 } catch(e) {
     testFailed("An exception was thrown: " + e.message);
 }
 
 // Test createTouchList with invalid arguments which throws exceptions.
 try {
     var tl = document.createTouchList(1, 2);
 } catch(e) {
-    testFailed("An exception was thrown: " + e.message);
+    testPassed("An exception was thrown: " + e.message);
 }
 isSuccessfullyParsed();