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

client/html/src/ObjectElement.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.
-
-interface ObjectElement extends Element {
-
-  String get align();
-
-  void set align(String value);
-
-  String get archive();
-
-  void set archive(String value);
-
-  String get border();
-
-  void set border(String value);
-
-  String get code();
-
-  void set code(String value);
-
-  String get codeBase();
-
-  void set codeBase(String value);
-
-  String get codeType();
-
-  void set codeType(String value);
-
-  Document get contentDocument();
-
-  String get data();
-
-  void set data(String value);
-
-  bool get declare();
-
-  void set declare(bool value);
-
-  FormElement get form();
-
-  String get height();
-
-  void set height(String value);
-
-  int get hspace();
-
-  void set hspace(int value);
-
-  String get name();
-
-  void set name(String value);
-
-  String get standby();
-
-  void set standby(String value);
-
-  String get type();
-
-  void set type(String value);
-
-  String get useMap();
-
-  void set useMap(String value);
-
-  String get validationMessage();
-
-  ValidityState get validity();
-
-  int get vspace();
-
-  void set vspace(int value);
-
-  String get width();
-
-  void set width(String value);
-
-  bool get willValidate();
-
-  bool checkValidity();
-
-  void setCustomValidity(String error);
-
-  // Don't support getSVGDocument because the content document won't have all
-  // the necessary patches to the prototype hierarchy under Frog.
-}