Fix Windows bugs in r26181

tests/lib/mirrors/library_uri_io_test.dart

Index: tests/lib/mirrors/library_uri_io_test.dart
diff --git a/tests/lib/mirrors/library_uri_io_test.dart b/tests/lib/mirrors/library_uri_io_test.dart
index e23da244e0d2f299ac9f925c818348e3842f47d1..c7ff8519425c86e6ca624e4d3af88b17ad48b84f 100644
--- a/tests/lib/mirrors/library_uri_io_test.dart
+++ b/tests/lib/mirrors/library_uri_io_test.dart
@@ -24,10 +24,8 @@ main() {
   var mirrors = currentMirrorSystem();
   test("Test current library uri", () {
     String appendSlash(String path) => path.endsWith('/') ? path : '$path/';
-    Uri cwd = new Uri(
-        scheme: 'file',
-        path: appendSlash(new File('.').fullPathSync()));
-    Uri uri = cwd.resolve(Platform.script);
+    Uri cwd = new Uri.file(appendSlash(new File('.').fullPathSync()));
+    Uri uri = cwd.resolveUri(new Uri.file(Platform.script));
     testLibraryUri(new Class(), uri);
   });
 }