Remove files that have already been ported or do not need to be ported.

client/html/src/ObjectElementWrappingImplementation.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 ObjectElementWrappingImplementation extends ElementWrappingImplementation implements ObjectElement {
-  ObjectElementWrappingImplementation._wrap(ptr) : super._wrap(ptr) {}
-
-  String get align() { return _ptr.align; }
-
-  void set align(String value) { _ptr.align = value; }
-
-  String get archive() { return _ptr.archive; }
-
-  void set archive(String value) { _ptr.archive = value; }
-
-  String get border() { return _ptr.border; }
-
-  void set border(String value) { _ptr.border = value; }
-
-  String get code() { return _ptr.code; }
-
-  void set code(String value) { _ptr.code = value; }
-
-  String get codeBase() { return _ptr.codeBase; }
-
-  void set codeBase(String value) { _ptr.codeBase = value; }
-
-  String get codeType() { return _ptr.codeType; }
-
-  void set codeType(String value) { _ptr.codeType = value; }
-
-  Document get contentDocument() { return LevelDom.wrapDocument(_ptr.contentDocument); }
-
-  String get data() { return _ptr.data; }
-
-  void set data(String value) { _ptr.data = value; }
-
-  bool get declare() { return _ptr.declare; }
-
-  void set declare(bool value) { _ptr.declare = value; }
-
-  FormElement get form() { return LevelDom.wrapFormElement(_ptr.form); }
-
-  String get height() { return _ptr.height; }
-
-  void set height(String value) { _ptr.height = value; }
-
-  int get hspace() { return _ptr.hspace; }
-
-  void set hspace(int value) { _ptr.hspace = value; }
-
-  String get name() { return _ptr.name; }
-
-  void set name(String value) { _ptr.name = value; }
-
-  String get standby() { return _ptr.standby; }
-
-  void set standby(String value) { _ptr.standby = value; }
-
-  String get type() { return _ptr.type; }
-
-  void set type(String value) { _ptr.type = value; }
-
-  String get useMap() { return _ptr.useMap; }
-
-  void set useMap(String value) { _ptr.useMap = value; }
-
-  String get validationMessage() { return _ptr.validationMessage; }
-
-  ValidityState get validity() { return LevelDom.wrapValidityState(_ptr.validity); }
-
-  int get vspace() { return _ptr.vspace; }
-
-  void set vspace(int value) { _ptr.vspace = value; }
-
-  String get width() { return _ptr.width; }
-
-  void set width(String value) { _ptr.width = value; }
-
-  bool get willValidate() { return _ptr.willValidate; }
-
-  bool checkValidity() {
-    return _ptr.checkValidity();
-  }
-
-  void setCustomValidity(String error) {
-    _ptr.setCustomValidity(error);
-    return;
-  }
-}