Fix regression in RenderTransform caused by change to Canvas.concat.

sky/sdk/lib/framework/rendering/box.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:math' as math;
 import 'dart:sky' as sky;
 import 'dart:typed_data';
 import 'object.dart';
 import 'package:vector_math/vector_math.dart';
 import 'package:sky/framework/net/image_cache.dart' as image_cache;
@@ skipping 524 matching lines @@
     double det = inverse.copyInverse(_transform);
     // TODO(abarth): Check the determinant for degeneracy.
 
     Vector3 position3 = new Vector3(position.x, position.y, 0.0);
     Vector3 transformed3 = inverse.transform3(position3);
     sky.Point transformed = new sky.Point(transformed3.x, transformed3.y);
     super.hitTestChildren(result, position: transformed);
   }
 
   void paint(RenderObjectDisplayList canvas) {
-    Float32List storage = _transform.storage;
-
     canvas.save();
-    canvas.concat([
-      storage[ 0], storage[ 4], storage[12],
-      storage[ 1], storage[ 5], storage[13],
-      storage[ 3], storage[ 7], storage[15],
-    ]);
+    canvas.concat(_transform.storage);
     super.paint(canvas);
     canvas.restore();
   }
 }
 
 
 // RENDER VIEW LAYOUT MANAGER
 
 class ViewConstraints {
 
@@ skipping 93 matching lines @@
 
   void defaultPaint(RenderObjectDisplayList canvas) {
     RenderBox child = firstChild;
     while (child != null) {
       assert(child.parentData is ParentDataType);
       canvas.paintChild(child, child.parentData.position);
       child = child.parentData.nextSibling;
     }
   }
 }