Rename client/{dom,html} to lib/{dom,html} .

client/html/src/DeviceOrientationEventWrappingImplementation.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-class DeviceOrientationEventWrappingImplementation extends EventWrappingImplementation implements DeviceOrientationEvent {
-  DeviceOrientationEventWrappingImplementation._wrap(ptr) : super._wrap(ptr);
-
-  factory DeviceOrientationEventWrappingImplementation(String type,
-      double alpha, double beta, double gamma, [bool canBubble = true,
-      bool cancelable = true]) {
-    final e = dom.document.createEvent("DeviceOrientationEvent");
-    e.initDeviceOrientationEvent(
-        type, canBubble, cancelable, alpha, beta, gamma);
-    return LevelDom.wrapDeviceOrientationEvent(e);
-  }
-
-  num get alpha() => _ptr.alpha;
-
-  num get beta() => _ptr.beta;
-
-  num get gamma() => _ptr.gamma;
-}