Add support for text styles.

sky/sdk/lib/framework/widgets/ui_node.dart

Index: sky/sdk/lib/framework/widgets/ui_node.dart
diff --git a/sky/sdk/lib/framework/widgets/ui_node.dart b/sky/sdk/lib/framework/widgets/ui_node.dart
index 44db51f5ca8e8aafb08f338a2ec5611705555997..026d1f00f24112f02a010386157f93e35b5eac27 100644
--- a/sky/sdk/lib/framework/widgets/ui_node.dart
+++ b/sky/sdk/lib/framework/widgets/ui_node.dart
@@ -744,7 +744,6 @@ abstract class MultiChildRenderObjectWrapper extends RenderObjectWrapper {
 
 }
 
-
 class UINodeAppView extends AppView {
 
   UINodeAppView({ RenderView renderViewOverride: null })
@@ -770,7 +769,7 @@ class UINodeAppView extends AppView {
         if (target is EventListenerNode)
           target._handleEvent(event);
         target = target._parent;
-      }      
+      }
     }
   }
 
@@ -855,5 +854,4 @@ class RenderObjectToUINodeAdapter extends AbstractUINodeRoot {
   }
 
   UINode build() => builder();
-
-}
+}