Random cleanup of various Dart things in our tree.

sky/sdk/example/rendering/justify_content.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 'dart:sky';
-import 'dart:math' as math;
 
-import 'package:sky/rendering/block.dart';
+import 'package:sky/painting/text_style.dart';
 import 'package:sky/rendering/box.dart';
 import 'package:sky/rendering/flex.dart';
 import 'package:sky/rendering/object.dart';
 import 'package:sky/rendering/paragraph.dart';
 import 'package:sky/rendering/sky_binding.dart';
 
 import 'solid_color_box.dart';
 
+const TextStyle style = const TextStyle(color: const Color(0xFF000000));
+
 // Attempts to draw
 // http://www.w3.org/TR/2015/WD-css-flexbox-1-20150514/images/flex-pack.svg
 void main() {
   var table = new RenderFlex(direction: FlexDirection.vertical);
 
   void addRow(FlexJustifyContent justify) {
-    RenderParagraph paragraph = new RenderParagraph(new InlineText("${justify}"));
+    RenderParagraph paragraph = new RenderParagraph(new InlineStyle(style, [new InlineText("${justify}")]));
     table.add(new RenderPadding(child: paragraph, padding: new EdgeDims.only(top: 20.0)));
     var row = new RenderFlex(direction: FlexDirection.horizontal);
     row.add(new RenderSolidColorBox(const Color(0xFFFFCCCC), desiredSize: new Size(80.0, 60.0)));
     row.add(new RenderSolidColorBox(const Color(0xFFCCFFCC), desiredSize: new Size(64.0, 60.0)));
     row.add(new RenderSolidColorBox(const Color(0xFFCCCCFF), desiredSize: new Size(160.0, 60.0)));
     row.justifyContent = justify;
     table.add(row);
     row.parentData.flex = 1;
   }
 
   addRow(FlexJustifyContent.flexStart);
   addRow(FlexJustifyContent.flexEnd);
   addRow(FlexJustifyContent.center);
   addRow(FlexJustifyContent.spaceBetween);
   addRow(FlexJustifyContent.spaceAround);
 
   RenderDecoratedBox root = new RenderDecoratedBox(
     decoration: new BoxDecoration(backgroundColor: const Color(0xFFFFFFFF)),
     child: new RenderPadding(child: table, padding: new EdgeDims.symmetric(vertical: 50.0))
   );
 
   new SkyBinding(root: root);
 }