Update vm test of LibraryMirror.

runtime/tests/vm/dart/isolate_mirror_local_test.dart

Index: runtime/tests/vm/dart/isolate_mirror_local_test.dart
diff --git a/runtime/tests/vm/dart/isolate_mirror_local_test.dart b/runtime/tests/vm/dart/isolate_mirror_local_test.dart
index 772ce66a2e769619ef9503c4b967dfc0e9c091be..9031873ba73d7d0c0028b83c5a220f713e098d20 100644
--- a/runtime/tests/vm/dart/isolate_mirror_local_test.dart
+++ b/runtime/tests/vm/dart/isolate_mirror_local_test.dart
@@ -115,7 +115,7 @@ void testRootLibraryMirror(LibraryMirror lib_mirror) {
                 lib_mirror.qualifiedName);
   Expect.equals(null, lib_mirror.owner);
   Expect.isFalse(lib_mirror.isPrivate);
-  Expect.isTrue(lib_mirror.url.contains('isolate_mirror_local_test.dart'));
+  Expect.isTrue(lib_mirror.uri.path.contains('isolate_mirror_local_test.dart'));
   // TODO(ahe): toString() test disabled for now as Symbols are 100% opaque.
   // Expect.equals("LibraryMirror on 'isolate_mirror_local_test'",
   //               lib_mirror.toString());