Fork some more files from the old framework, so that the transition will be easier to perform.

sky/sdk/lib/rendering/box.dart

Index: sky/sdk/lib/rendering/box.dart
diff --git a/sky/sdk/lib/rendering/box.dart b/sky/sdk/lib/rendering/box.dart
index 0679b9b87b5d8471a5f868ba990b57e32157bb16..fd999ad8b72e770746b2031d11fa5ef011ab5402 100644
--- a/sky/sdk/lib/rendering/box.dart
+++ b/sky/sdk/lib/rendering/box.dart
@@ -7,8 +7,8 @@ import 'dart:sky' as sky;
 
 import 'package:vector_math/vector_math.dart';
 
-import '../framework/debug/utils.dart';
-import '../framework/net/image_cache.dart' as image_cache;
+import '../debug/utils.dart';
+import '../mojo/net/image_cache.dart' as image_cache;
 import '../painting/box_painter.dart';
 import 'object.dart';