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

sky/examples/stocks2/lib/stock_app.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 'package:sky/framework/components2/tool_bar.dart';
 // import 'package:sky/framework/components2/drawer.dart';
 // import 'package:sky/framework/components2/drawer_header.dart';
 // import 'package:sky/framework/components2/floating_action_button.dart';
 // import 'package:sky/framework/components2/icon.dart';
 import 'package:sky/framework/components2/icon_button.dart';
@@ skipping 191 matching lines @@
   //     )],
   //     onDismiss: _handleMenuHide));
   // }
 
   UINode build() {
     // List<UINode> overlays = [];
     // addMenuToOverlays(overlays);
     return new Container(
       child: new BlockContainer(children: [buildToolBar()]),
       decoration: new BoxDecoration(
-        backgroundColor: 0xFFFFFFFF
+        backgroundColor: const sky.Color(0xFFFFFFFF)
       )
     );
 
     // return new Scaffold(
     //    toolbar: _isSearching ? buildSearchBar() : buildToolBar()
     // ,
     //   body: new Stocklist(stocks: _stocks, query: _searchQuery),
     //   floatingActionButton: new FloatingActionButton(
     //     content: new Icon(type: 'content/add_white', size: 24), level: 3),
     //   drawer: _drawerShowing ? buildDrawer() : null,
     //   overlays: overlays
     // );
   }
 }
 
 void main() {
   print("starting stocks app!");
   new StocksApp();
 }