Remove one more use of mirrors: Components now have to explicitly sync their fields.

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

Index: sky/sdk/lib/framework/components2/floating_action_button.dart
diff --git a/sky/sdk/lib/framework/components2/floating_action_button.dart b/sky/sdk/lib/framework/components2/floating_action_button.dart
index e4be516755e90bebe92a8aef6f201ace3b200256..ba76b250b61129dc751f17c68ad07513638a1193 100644
--- a/sky/sdk/lib/framework/components2/floating_action_button.dart
+++ b/sky/sdk/lib/framework/components2/floating_action_button.dart
@@ -20,6 +20,12 @@ class FloatingActionButton extends Component {
   UINode content;
   int level;
 
+  void syncFields(FloatingActionButton source) {
+    content = source.content;
+    level = source.level;
+    super.syncFields(source);
+  }
+
   UINode build() {
     List<UINode> children = [];