Update BoxDecoration and RenderParagraph to use sky.Color instead of int.

sky/tests/resources/display_list.dart

 
 import 'package:sky/framework/rendering/node.dart';
 import 'package:sky/framework/rendering/box.dart';
 import 'dart:sky' as sky;
 
 typedef void Logger (String s);
 
 class TestDisplayList extends RenderNodeDisplayList {
   TestDisplayList(double width, double height, this.logger, { this.indent: '' }) :
     this.width = width,
     this.height = height,
     super(width, height) {
     log("TestDisplayList() constructor: $width x $height");
   }
 
   final String indent;
   final double width;
   final double height;
 
   Logger logger;
   void log(String s) {
     logger("${indent} ${s}");
   }
 
   String explainPaint(sky.Paint paint) {
-    return "Paint(0x${paint.color.value.toRadixString(16).padLeft(8, '0')})";
+    return "Paint(${paint.color})";
   }
 
   void save() {
     log("save");
   }
 
   void saveLayer(sky.Rect bounds, sky.Paint paint) {
     log("saveLayer(${bounds.top}:${bounds.left}:${bounds.bottom}:${bounds.right}, ${explainPaint(paint)})");
   }
 
@@ skipping 99 matching lines @@
   void set root(RenderBox value) {
     _renderView.child = value;
   }
   void _beginFrame(double timeStamp) {
     RenderNode.flushLayout();
     _renderView.paintFrame();
     print(_renderView.lastPaint); // TODO(ianh): figure out how to make this fit the unit testing framework better
   }
 
 }