Move AnimatedComponent away from mirrors and towards a callback-based setter.

sky/sdk/lib/framework/rendering/paragraph.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:sky' as sky;
 import 'box.dart';
 import 'object.dart';
 
 class RenderInline extends RenderObject {
   String data;
@@ skipping 59 matching lines @@
 
   double getMaxIntrinsicWidth(BoxConstraints constraints) {
     _layout(constraints);
     return constraints.constrainWidth(
         _applyFloatingPointHack(_layoutRoot.rootElement.maxContentWidth));
   }
 
   double _getIntrinsicHeight(BoxConstraints constraints) {
     _layout(constraints);
     return constraints.constrainHeight(
-        _applyFloatingPointHack(_layoutRoot.rootElement.height.ceilToDouble));
+        _applyFloatingPointHack(_layoutRoot.rootElement.height));
   }
 
   double getMinIntrinsicHeight(BoxConstraints constraints) {
     return _getIntrinsicHeight(constraints);
   }
 
   double getMaxIntrinsicHeight(BoxConstraints constraints) {
     return _getIntrinsicHeight(constraints);
   }
 
@@ skipping 20 matching lines @@
       _layoutRoot.rootElement.style['color'] =
           'rgba(${_color.red}, ${_color.green}, ${_color.blue}, ${_color.alpha / 255.0 })';
     }
     _layoutRoot.paint(canvas);
   }
 
   // we should probably expose a way to do precise (inter-glpyh) hit testing
 
   String debugDescribeSettings(String prefix) => '${super.debugDescribeSettings(prefix)}${prefix}color: ${color}\n${prefix}text: ${text}\n';
 }