Fix some minor warnings from the analyzer in the framework.

sky/sdk/lib/framework/components2/ink_well.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 '../fn2.dart';
 import '../rendering/flex.dart';
 import 'dart:collection';
 import 'dart:sky' as sky;
 // import 'ink_splash.dart';
 import 'scrollable.dart';
@@ skipping 51 matching lines @@
   //     _splashes.add(splash);
   //     UINode node = parent;
   //     while (node != null) {
   //       if (node is Scrollable)
   //         node.registerScrollClient(this);
   //       node = node.parent;
   //     }
   //   });
   // }
 
-  // bool ancestorScrolled(Scrollable ancestor) {
+  bool ancestorScrolled(Scrollable ancestor) {
   //   _abortSplashes();
-  //   return false;
-  // }
+    return false;
+  }
 
   // void handleRemoved() {
   //   UINode node = parent;
   //   while (node != null) {
   //     if (node is Scrollable)
   //       node.unregisterScrollClient(this);
   //     node = node.parent;
   //   }
   //   super.handleRemoved();
   // }
@@ skipping 26 matching lines @@
   // void _splashDone(SplashController splash) {
   //   if (_splashes == null)
   //     return;
   //   setState(() {
   //     _splashes.remove(splash);
   //     if (_splashes.length == 0)
   //       _splashes = null;
   //   });
   // }
 }