Update unittest to new package layout.

tests/html/indexeddb_3_test.dart

 #library('IndexedDB3Test');
-#import('../../pkg/unittest/unittest.dart');
-#import('../../pkg/unittest/html_config.dart');
+#import('../../pkg/unittest/lib/unittest.dart');
+#import('../../pkg/unittest/lib/html_config.dart');
 #import('dart:html');
 
 // Read with cursor.
 
 const String DB_NAME = 'Test';
 const String STORE_NAME = 'TEST';
 const String VERSION = '1';
 
 class Test {
   var db;
@@ skipping 35 matching lines @@
       request.on.success.add(expectAsync1((e) {
           writeItems(index + 1);
         }
       ));
       request.on.error.add(fail('put'));
     }
   }
 
   fail(message) => (e) {
     guardAsync(() {
-      Expect.fail('IndexedDB failure: $message'); 
+      Expect.fail('IndexedDB failure: $message');
     });
   };
 
   readAllViaCursor() {
     IDBTransaction txn = db.transaction(STORE_NAME, 'readonly');
     IDBObjectStore objectStore = txn.objectStore(STORE_NAME);
     IDBRequest cursorRequest = objectStore.openCursor();
     int itemCount = 0;
     int sumKeys = 0;
     int lastKey = null;
@@ skipping 43 matching lines @@
 }
 
 main() {
   useHtmlConfiguration();
 
   var test_ = new Test();
   test('prepare', test_.start);
   test('readAll1', test_.readAllViaCursor);
   test('readAll2', test_.readAllReversedViaCursor);
 }