Fix all the components to pick the right colours from the theme.

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';
+import 'theme.dart';
 import 'widget.dart';
 
 const BoxDecoration _kHighlightDecoration = const BoxDecoration(
   backgroundColor: const Color.fromARGB(102, 153, 153, 153)
 );
 
 // TODO(abarth): We shouldn't need _kHighlightBoring, but currently Container
 //               isn't smart enough to retain the components it builds when we
 //               add or remove a |decoration|. For now, we use a transparent
 //               decoration to avoid changing the structure of the tree. The
@@ skipping 11 matching lines @@
   List<Widget> children;
   Function onPressed;
 
   void syncFields(MenuItem source) {
     icon = source.icon;
     children = source.children;
     onPressed = source.onPressed;
     super.syncFields(source);
   }
 
+  TextStyle get textStyle {
+    TextStyle result = Theme.of(this).text.body2;
+    if (highlight)
+      result = result.copyWith(color: Theme.of(this).primary[500]);
+    return result;
+  }
+
   Widget buildContent() {
     return new Listener(
       onGestureTap: (_) {
         if (onPressed != null)
           onPressed();
       },
       child: new Container(
         height: 48.0,
         decoration: highlight ? _kHighlightDecoration : _kHighlightBoring,
         child: new InkWell(
           child: new Flex([
             new Padding(
               padding: const EdgeDims.symmetric(horizontal: 16.0),
               child: new Icon(type: "${icon}_grey600", size: 24)
             ),
             new Flexible(
-              flex: 1,
               child: new Padding(
                 padding: const EdgeDims.symmetric(horizontal: 16.0),
-                child: new Flex(children, direction: FlexDirection.horizontal)
+                child: new DefaultTextStyle(
+                  style: textStyle,
+                  child: new Flex(children, direction: FlexDirection.horizontal)
+                )
               )
             )
           ])
         )
       )
     );
   }
 }