Make popup menus line up to their baseline per the Material spec.

sky/sdk/lib/rendering/paragraph.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' as sky;
 
 import 'box.dart';
 import 'object.dart';
 import '../painting/text_style.dart';
 
@@ skipping 136 matching lines @@
   }
 
   double getMinIntrinsicHeight(BoxConstraints constraints) {
     return _getIntrinsicHeight(constraints);
   }
 
   double getMaxIntrinsicHeight(BoxConstraints constraints) {
     return _getIntrinsicHeight(constraints);
   }
 
-  double getDistanceToActualBaseline(TextBaseline baseline) {
+  double computeDistanceToActualBaseline(TextBaseline baseline, RenderObject client) {
     assert(!needsLayout);
     _layout(constraints);
     sky.Element root = _layoutRoot.rootElement;
     switch (baseline) {
       case TextBaseline.alphabetic: return root.alphabeticBaseline;
       case TextBaseline.ideographic: return root.ideographicBaseline;
     }
   }
 
   void performLayout() {
@@ skipping 21 matching lines @@
   }
 
   // we should probably expose a way to do precise (inter-glpyh) hit testing
 
   String debugDescribeSettings(String prefix) {
     String result = '${super.debugDescribeSettings(prefix)}';
     result += '${prefix}inline:\n${inline.toString("$prefix  ")}\n';
     return result;
   }
 }