Predeclare globals required by the test framework to avoid walking the prototype chain.

Otherwise http/tests/security/xss-DENIED-method-with-iframe-proto.html double-faults while trying to read those global variables that aren't declared.

BUG=

Review URL: https://codereview.chromium.org/405893003

git-svn-id: svn://svn.chromium.org/blink/trunk@178553 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/resources/js-test.js

@@ -726,6 +726,8 @@ function isSuccessfullyParsed()
     debug('<br /><span class="pass">TEST COMPLETE</span>');
 }
 
+var wasPostTestScriptParsed, wasFinishJSTestCalled, jsTestIsAsync;
+
 // It's possible for an async test to call finishJSTest() before js-test-post.js
 // has been parsed.
 function finishJSTest()