Cleanup of SkyBinding, and resultant yak shaving.

sky/sdk/lib/base/hit_test.dart

Index: sky/sdk/lib/base/hit_test.dart
diff --git a/sky/sdk/lib/base/hit_test.dart b/sky/sdk/lib/base/hit_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..9707142760de5d33072abe31c00c656cccb1a50f
--- /dev/null
+++ b/sky/sdk/lib/base/hit_test.dart
@@ -0,0 +1,21 @@
+// 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;
+
+abstract class HitTestTarget {
+  void handleEvent(sky.Event event, HitTestEntry entry);
+}
+
+class HitTestEntry {
+  const HitTestEntry(this.target);
+  final HitTestTarget target;
+}
+
+class HitTestResult {
+  final List<HitTestEntry> path = new List<HitTestEntry>();
+  void add(HitTestEntry data) {
+    path.add(data);
+  }
+}