Removed fixed dependencies

packages/dart_style/test/utils.dart

 // Copyright (c) 2014, 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.
 
 library dart_style.test.utils;
 
 import 'dart:io';
 import 'dart:mirrors';
 
 import 'package:path/path.dart' as p;
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_process.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
 const unformattedSource = 'void  main()  =>  print("hello") ;';
 const formattedSource = 'void main() => print("hello");\n';
 
 /// Runs the command line formatter, passing it [args].
 ScheduledProcess runFormatter([List<String> args]) {
   if (args == null) args = [];
 
   // Locate the "test" directory. Use mirrors so that this works with the test
   // package, which loads this suite into an isolate.
-  var testDir = p.dirname(
-      currentMirrorSystem().findLibrary(#dart_style.test.utils).uri.path);
+  var testDir = p.dirname(currentMirrorSystem()
+      .findLibrary(#dart_style.test.utils)
+      .uri
+      .toFilePath());
 
   var formatterPath = p.normalize(p.join(testDir, "../bin/format.dart"));
 
   args.insert(0, formatterPath);
 
   // Use the same package root, if there is one.
-  if (Platform.packageRoot.isNotEmpty) {
+  if (Platform.packageRoot != null && Platform.packageRoot.isNotEmpty) {
     args.insert(0, "--package-root=${Platform.packageRoot}");
+  } else if (Platform.packageConfig != null &&
+      Platform.packageConfig.isNotEmpty) {
+    args.insert(0, "--packages=${Platform.packageConfig}");
   }
 
   return new ScheduledProcess.start(Platform.executable, args);
 }
 
 /// Runs the command line formatter, passing it the test directory followed by
 /// [args].
 ScheduledProcess runFormatterOnDir([List<String> args]) {
   if (args == null) args = [];
   return runFormatter([d.defaultRoot]..addAll(args));
 }
 
 /// Set up the scheduled test suite.
 ///
 /// Configures the unit test output and makes a sandbox directory for the
 /// scheduled tests to run in.
 void setUpTestSuite() {
   // Make a sandbox directory for the scheduled tests to run in.
   setUp(() {
     var tempDir = Directory.systemTemp.createTempSync('dart_style.test.');
     d.defaultRoot = tempDir.path;
 
     currentSchedule.onComplete.schedule(() {
       d.defaultRoot = null;
       return tempDir.delete(recursive: true);
     });
   });
 }