test renaming overhaul: step 4 client tests

tests/dom/history_test.dart

 #library('HistoryTest');
-#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('History', () {
     window.history.pushState(null, document.title, '?foo=bar');
     expect(window.history.length).equals(2);
     window.history.back();
     expect(window.location.href.endsWith('foo=bar')).isTrue();
 
     window.history.replaceState(null, document.title, '?foo=baz');
     Expect.equals(2, window.history.length);
     expect(window.location.href.endsWith('foo=baz')).isTrue();
   });
 }