test renaming overhaul: step 4 client tests

tests/dom/instance_of_test.dart

 #library('InstanceOfTest');
-#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() {
   HTMLCanvasElement canvas;
 
   canvas = document.createElement('canvas');
   canvas.setAttribute('width', '100');
   canvas.setAttribute('height', '100');
   document.body.appendChild(canvas);
 
@@ skipping 32 matching lines @@
     Expect.isFalse(bytes is HTMLCanvasElement);
     Expect.isFalse(bytes is ImageData);
     Expect.isTrue(bytes is Uint8ClampedArray);
 
     // FIXME: Ensure this is an HTMLSpanElement when we next update
     // WebKit IDL.
     var span = document.createElement('span');
     Expect.isTrue(span is HTMLElement);
   });
 }