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

sky/sdk/lib/framework/components2/icon.dart

Index: sky/sdk/lib/framework/components2/icon.dart
diff --git a/sky/sdk/lib/framework/components2/icon.dart b/sky/sdk/lib/framework/components2/icon.dart
index 08913b05d4a83e9fb9cc397f029fadd7d195660c..ed4d5a78b02b00d91455908ce7837cb6015dccdd 100644
--- a/sky/sdk/lib/framework/components2/icon.dart
+++ b/sky/sdk/lib/framework/components2/icon.dart
@@ -30,7 +30,7 @@ class Icon extends Component {
     // TODO(jackson): Use a real image.
     return new Container(
       desiredSize: new sky.Size(size.toDouble(), size.toDouble()),
-      decoration: new BoxDecoration(backgroundColor: 0xFFFF0000)
+      decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFFFF0000))
     );
     // return new Image(width: size, height: size,
     //   src: '${kAssetBase}/${category}/2x_web/ic_${subtype}_${size}dp.png');