Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/samples/ui_lib/layout/layout.dart

Index: dart/samples/ui_lib/layout/layout.dart
diff --git a/dart/samples/ui_lib/layout/layout.dart b/dart/samples/ui_lib/layout/layout.dart
index 39e662cf1e057c8b835bc359a269e89810414fca..f3599fb4019aa7a84c22cc0dfdb1524391523ce1 100644
--- a/dart/samples/ui_lib/layout/layout.dart
+++ b/dart/samples/ui_lib/layout/layout.dart
@@ -2,17 +2,17 @@
 // 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 layout;
+#library('layout.dart');
 
-import 'dart:html';
-import 'dart:math' as Math;
+#import('dart:html');
+#import('dart:math', prefix: 'Math');
 
-import '../base/base.dart';
-import '../util/utilslib.dart';
+#import('../base/base.dart');
+#import('../util/utilslib.dart');
 
-part 'GridLayout.dart';
-part 'GridLayoutParams.dart';
-part 'GridLayoutParser.dart';
-part 'GridTracks.dart';
-part 'SizingFunctions.dart';
-part 'ViewLayout.dart';
+#source('GridLayout.dart');
+#source('GridLayoutParams.dart');
+#source('GridLayoutParser.dart');
+#source('GridTracks.dart');
+#source('SizingFunctions.dart');
+#source('ViewLayout.dart');