Fix report test

test/report_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Tests for summary reporting.
 library ddc.test.report_test;
 
 import 'package:unittest/compact_vm_config.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 16 matching lines @@
           test2() {
             int y = /*info:DownCast*/x;
           }
       ''',
     };
     testChecker(files);
     var reporter = new SummaryReporter();
     testChecker(files, reporter: reporter);
 
     var summary1 = reporter.result;
-    expect(summary1.loose['main'].messages.length, 1);
-    expect(summary1.packages['foo'].libraries['bar'].messages.length, 1);
+    expect(summary1.loose['file:///main.dart'].messages.length, 1);
+    var barUrl = 'package:foo/bar.dart';
+    expect(summary1.packages['foo'].libraries[barUrl].messages.length, 1);
 
     var summary2 = GlobalSummary.parse(summary1.toJsonMap());
-    expect(summary2.loose['main'].messages.length, 1);
-    expect(summary2.packages['foo'].libraries['bar'].messages.length, 1);
+    expect(summary2.loose['file:///main.dart'].messages.length, 1);
+    expect(summary2.packages['foo'].libraries[barUrl].messages.length, 1);
   });
 }