Changed default Uri constructor to Uri.fromComponents(), new default constructor is Uri.fromString(…

dart/lib/compiler/implementation/filenames.dart

Index: dart/lib/compiler/implementation/filenames.dart
diff --git a/dart/lib/compiler/implementation/filenames.dart b/dart/lib/compiler/implementation/filenames.dart
index 7dc6ed3f3b01483dcf66fae574567cb4d5863c15..ad086b3242eb636f6261cd3edbbf3a3fb37f5db1 100644
--- a/dart/lib/compiler/implementation/filenames.dart
+++ b/dart/lib/compiler/implementation/filenames.dart
@@ -35,7 +35,7 @@ String uriPathToNative(String path) {
 
 Uri getCurrentDirectory() {
   final String dir = nativeToUriPath(new File('.').fullPathSync());
-  return new Uri(scheme: 'file', path: appendSlash(dir));
+  return new Uri.fromComponents(scheme: 'file', path: appendSlash(dir));
 }
 
 String appendSlash(String path) => path.endsWith('/') ? path : '$path/';