Check in generated Dart bindings and add presubmit script

mojo/dart/packages/mojo_services/lib/mojo/view_manager_constants.mojom.dart

Index: mojo/dart/packages/mojo_services/lib/mojo/view_manager_constants.mojom.dart
diff --git a/mojo/dart/packages/mojo_services/lib/mojo/view_manager_constants.mojom.dart b/mojo/dart/packages/mojo_services/lib/mojo/view_manager_constants.mojom.dart
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index 0000000000000000000000000000000000000000..0f45bf4f9051bbf0270bda3cd58b0be8f7cc244f
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@@ -0,0 +1,62 @@
+// Copyright 2014 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.
+
+library view_manager_constants_mojom;
+
+import 'dart:async';
+
+import 'package:mojo/bindings.dart' as bindings;
+import 'package:mojo/core.dart' as core;
+class OrderDirection extends bindings.MojoEnum {
+  static const ABOVE = const OrderDirection._(1);
+  static const BELOW = const OrderDirection._(2);
+
+  const OrderDirection._(int v) : super(v);
+
+  static const Map<String, OrderDirection> valuesMap = const {
+    "ABOVE": ABOVE,
+    "BELOW": BELOW,
+  };
+  static const List<OrderDirection> values = const [
+    ABOVE,
+    BELOW,
+  ];
+
+  static OrderDirection valueOf(String name) => valuesMap[name];
+
+  factory OrderDirection(int v) {
+    switch (v) {
+      case 1:
+        return ABOVE;
+      case 2:
+        return BELOW;
+      default:
+        return null;
+    }
+  }
+
+  static OrderDirection decode(bindings.Decoder decoder0, int offset) {
+    int v = decoder0.decodeUint32(offset);
+    OrderDirection result = new OrderDirection(v);
+    if (result == null) {
+      throw new bindings.MojoCodecError(
+          'Bad value $v for enum OrderDirection.');
+    }
+    return result;
+  }
+
+  String toString() {
+    switch(this) {
+      case ABOVE:
+        return 'OrderDirection.ABOVE';
+      case BELOW:
+        return 'OrderDirection.BELOW';
+    }
+  }
+
+  int toJson() => value;
+}
+
+
+