Support for icon theming

sky/sdk/lib/widgets/menu_item.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 '../painting/text_style.dart';
 import 'basic.dart';
 import 'button_base.dart';
 import 'default_text_style.dart';
 import 'icon.dart';
 import 'ink_well.dart';
@@ skipping 31 matching lines @@
     super.syncFields(source);
   }
 
   TextStyle get textStyle {
     TextStyle result = Theme.of(this).text.body2;
     if (highlight)
       result = result.copyWith(color: Theme.of(this).primaryColor);
     return result;
   }
 
-  String get iconSuffix {
-    switch(Theme.of(this).brightness) {
-      case ThemeBrightness.dark:
-        return "white";
-      case ThemeBrightness.light:
-        return "black";
-    }
-  }
-
   Widget buildContent() {
     List<Widget> flexChildren = new List<Widget>();
     if (icon != null) {
       flexChildren.add(
         new Opacity(
           opacity: selected ? 1.0 : 0.45,
           child: new Padding(
             padding: const EdgeDims.symmetric(horizontal: 16.0),
-            child: new Icon(type: "${icon}_${iconSuffix}", size: 24)
+            child: new Icon(type: icon, size: 24)
           )
         )
       );
     }
     flexChildren.add(
       new Flexible(
         child: new Padding(
           padding: const EdgeDims.symmetric(horizontal: 16.0),
           child: new DefaultTextStyle(
             style: textStyle,
@@ skipping 13 matching lines @@
         child: new Container(
           decoration: highlight ? _kHighlightDecoration : _kHighlightBoring,
           child: new InkWell(
             child: new Flex(flexChildren)
           )
         )
       )
     );
   }
 }