Update unittest to new package layout.

tests/html/performance_api_test.dart

Index: tests/html/performance_api_test.dart
diff --git a/tests/html/performance_api_test.dart b/tests/html/performance_api_test.dart
index 74db2ddb3210c20829736bee92b8700e2354fd2e..5c3353c7621255c235628e389400f6c2ee04e7f7 100644
--- a/tests/html/performance_api_test.dart
+++ b/tests/html/performance_api_test.dart
@@ -1,6 +1,6 @@
 #library('PerformanceApiTest');
-#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');
 
 main() {
@@ -10,7 +10,7 @@ main() {
     var requestStart = window.performance.timing.requestStart;
     var responseStart = window.performance.timing.responseStart;
     var responseEnd = window.performance.timing.responseEnd;
-    
+
     var loading = window.performance.timing.domLoading;
     var loadedStart = window.performance.timing.domContentLoadedEventStart;
     var loadedEnd = window.performance.timing.domContentLoadedEventEnd;