[Async][WIP] Call FrameLoader::checkCompleted() asynchronously to avoid sync body.onload()

third_party/WebKit/LayoutTests/fast/dom/Window/resources/window-property-collector.js

 function collectProperties(windowHasBeenGCed)
 {
     // Collect properties of the top-level window, since touching the properties
     // of a DOMWindow affects its internal C++ state.
     collectPropertiesHelper(window, windowHasBeenGCed, []);
 
     propertiesToVerify.sort(function (a, b)
     {
         if (a.property < b.property)
             return -1
         if (a.property > b.property)
             return 1;
         return 0;
     });
 }
 
 function emitExpectedResult(path, expected)
 {
     // Skip internals properties, since they aren't web accessible.
     if (path[0] == 'internals'
         || path[0] == 'propertiesToVerify' // Skip the list we're building...
         || path[0] == 'clientInformation' // Just an alias for navigator.
         || path[0] == 'testRunner' // Skip testRunner since they are only for testing.
         || path[0] == 'layoutTestController' // Just an alias for testRunner.
-        || path[0] == 'eventSender') { // Skip eventSender since they are only for testing.
+        || path[0] == 'eventSender' // Skip eventSender since they are only for testing.
+        // Skip variables related to js-test.js since they are only for testing.
+        || path[0] == 'isJsTest'
+        || path[0] == 'jsTestIsAsync'
+        || path[0] == 'successfullyParsed'
+        || path[0] == 'wasFinishJSTestCalled'
+        || path[0] == 'wasPostTestScriptParsed') {
         return;
     }
 
     // Skip the properties which are hard to expect a stable result.
     if (path[0] == 'accessibilityController' // we can hardly estimate the states of the cached WebAXObjects.
         || path[0] == 'localStorage') { // local storage is not reliably cleared between tests.
         return;
     }
 
     // FIXME: Skip MemoryInfo for now, since it's not implemented as a DOMWindowProperty, and has
@@ skipping 76 matching lines @@
             emitExpectedResult(path, "0");
         } else if (type == "boolean") {
             expected = "false";
             if (path == "closed" && windowHasBeenGCed )
                 expected = "true";
             emitExpectedResult(path, expected);
         }
         path.pop();
     }
 }