A bunch of fixes in idl database generator.

client/dom/generated/src/wrapping/_ShadowRootWrappingImplementation.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.
+
+// WARNING: Do not edit - generated code.
+
+class _ShadowRootWrappingImplementation extends _NodeWrappingImplementation implements ShadowRoot {
+  _ShadowRootWrappingImplementation() : super() {}
+
+  static create__ShadowRootWrappingImplementation() native {
+    return new _ShadowRootWrappingImplementation();
+  }
+
+  Element get host() { return _get_host(this); }
+  static Element _get_host(var _this) native;
+
+  String get typeName() { return "ShadowRoot"; }
+}