Make the popup menu work again.

sky/examples/stocks2/lib/stock_row.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/rendering/box.dart';
 import 'package:sky/theme2/typography.dart' as typography;
 import 'package:sky/widgets/ink_well.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/rendering/paragraph.dart';
 
 import 'stock_arrow.dart';
 import 'stock_data.dart';
 
 class StockRow extends Component {
 
   StockRow({ Stock stock }) : this.stock = stock, super(key: stock.symbol);
 
   final Stock stock;
 
   static const double kHeight = 79.0;
 
   Widget build() {
     String lastSale = "\$${stock.lastSale.toStringAsFixed(2)}";
 
     String changeInPrice = "${stock.percentChange.toStringAsFixed(2)}%";
     if (stock.percentChange > 0) changeInPrice = "+" + changeInPrice;
 
     List<Widget> children = [
       new Container(
-          child: new StockArrow(percentChange: stock.percentChange),
-          margin: const EdgeDims.only(right: 5.0)),
-      new Flexible(child: new Text(stock.symbol), flex: 2, key: "symbol"),
-      // TODO(hansmuller): text-align: right
-      new Flexible(child: new Text(lastSale,
-            style: const TextStyle(textAlign: TextAlign.right)),
-          key: "lastSale"),
-      new Flexible(child: new Text(changeInPrice,
-          style: typography.black.caption.copyWith(textAlign: TextAlign.right)),
-        key: "changeInPrice")
+        child: new StockArrow(percentChange: stock.percentChange),
+        margin: const EdgeDims.only(right: 5.0)
+      ),
+      new Flexible(
+        child: new Text(stock.symbol),
+        flex: 2
+      ),
+      new Flexible(
+        child: new Text(
+          lastSale,
+          style: const TextStyle(textAlign: TextAlign.right)
+        )
+      ),
+      new Flexible(
+        child: new Text(
+          changeInPrice,
+          style: typography.black.caption.copyWith(textAlign: TextAlign.right)
+        )
+      )
     ];
 
     // TODO(hansmuller): An explicit |height| shouldn't be needed
     return new InkWell(
       child: new Container(
         padding: const EdgeDims(16.0, 16.0, 20.0, 16.0),
         height: kHeight,
         decoration: const BoxDecoration(
             border: const Border(
                 bottom: const BorderSide(color: const Color(0xFFF4F4F4)))),
         child: new Flex(children)
       )
     );
   }
 }