test renaming overhaul: step 4 client tests

tests/dom/css_test.dart

 #library('CSSTest');
-#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() {
   useDomConfiguration();
   test('WebKitCSSMatrix', () {
     WebKitCSSMatrix matrix1 = new WebKitCSSMatrix();
     Expect.equals(1, matrix1.m11.round());
     Expect.equals(0, matrix1.m12.round());
 
     WebKitCSSMatrix matrix2 = new WebKitCSSMatrix('matrix(1, 0, 0, 1, -835, 0)');
@@ skipping 20 matching lines @@
     point.y = 100;
     checkPoint(5, 100, point);
     checkPoint(254, 196, window.webkitConvertPointFromNodeToPage(element, point));
   });
 }
 
 void checkPoint(expectedX, expectedY, WebKitPoint point) {
   Expect.equals(expectedX, point.x.round(), 'Wrong point.x');
   Expect.equals(expectedY, point.y.round(), 'Wrong point.y');
 }