Dart: Removes all but native calls and the handle watcher from the snapshot.

mojo/public/dart/internal.dart

Index: mojo/public/dart/internal.dart
diff --git a/sky/engine/bindings/snapshot.dart b/mojo/public/dart/internal.dart
similarity index 58%
copy from sky/engine/bindings/snapshot.dart
copy to mojo/public/dart/internal.dart
index 2e8c5efd40f49a21b690d2837e82bd4336edee34..4239df2f6a6c9880a0bb04332d47ebda7b0211b6 100644
--- a/sky/engine/bindings/snapshot.dart
+++ b/mojo/public/dart/internal.dart
@@ -2,15 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+library internal;
+
 import 'dart:async';
 import 'dart:collection';
-import 'dart:convert';
-import 'dart:core';
 import 'dart:isolate';
-import 'dart:math';
-import 'dart:mirrors';
-import 'dart:sky';
-import 'dart:sky_builtin';
 import 'dart:typed_data';
-import 'dart:mojo.bindings';
-import 'dart:mojo.core';
+
+part 'src/handle_watcher.dart';
+part 'src/natives.dart';
+part 'src/timer_queue.dart';