test renaming overhaul: step 4 client tests

tests/dom/window_open_test.dart

 #library('WindowOpenTest');
-#import('../../../../lib/unittest/unittest.dart');
-#import('../../../../lib/unittest/dom_config.dart');
+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/dom_config.dart');
 #import('dart:dom');
 
 main() {
   evaluateJavaScript(code) {
     final scriptTag = document.createElement('script');
     scriptTag.innerHTML = code;
     document.body.appendChild(scriptTag);
   }
   evaluateJavaScript('layoutTestController.setCanOpenWindows()');
 
   useDomConfiguration();
   asyncTest('TwoArgumentVersion', 1, () {
     Window win = window.open('../resources/pong.html', 'testWindow');
     closeWindow(win);
   });
   asyncTest('ThreeArgumentVersion', 1, () {
     Window win = window.open("resources/pong.html", "testWindow", "scrollbars=yes,width=75,height=100");
     closeWindow(win);
   });
 }
 
 closeWindow(win) {
   win.close();
   doneHandler() {
     window.setTimeout(win.closed ? callbackDone : doneHandler, 1);
   }
   window.setTimeout(doneHandler, 1);
 }