Support 'Conditional' idl attribute.

client/dom/generated/src/interface/HTMLInputElement.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.
 
 interface HTMLInputElement extends HTMLElement {
 
   String get accept();
 
@@ skipping 62 matching lines @@
   bool get incremental();
 
   void set incremental(bool value);
 
   bool get indeterminate();
 
   void set indeterminate(bool value);
 
   NodeList get labels();
 
-  HTMLElement get list();
-
   String get max();
 
   void set max(String value);
 
   int get maxLength();
 
   void set maxLength(int value);
 
   String get min();
 
@@ skipping 16 matching lines @@
   void set placeholder(String value);
 
   bool get readOnly();
 
   void set readOnly(bool value);
 
   bool get required();
 
   void set required(bool value);
 
-  HTMLOptionElement get selectedOption();
-
   String get selectionDirection();
 
   void set selectionDirection(String value);
 
   int get selectionEnd();
 
   void set selectionEnd(int value);
 
   int get selectionStart();
 
@@ skipping 56 matching lines @@
   void select();
 
   void setCustomValidity(String error);
 
   void setSelectionRange(int start, int end, [String direction]);
 
   void stepDown([int n]);
 
   void stepUp([int n]);
 }