Add inputmode support to content editable.

third_party/WebKit/Source/core/html/HTMLTextAreaElement.idl

 /*
  * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2011 Motorola Mobility, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 10 matching lines @@
 
 // https://html.spec.whatwg.org/#the-textarea-element
 
 interface HTMLTextAreaElement : HTMLElement {
     // attribute DOMString autocomplete;
     [CEReactions, Reflect] attribute boolean autofocus;
     [CEReactions] attribute unsigned long cols;
     [CEReactions, Reflect] attribute DOMString dirName;
     [CEReactions, Reflect] attribute boolean disabled;
     [ImplementedAs=formOwner] readonly attribute HTMLFormElement? form;
-    [CEReactions, RuntimeEnabled=InputModeAttribute, Reflect] attribute DOMString inputMode;
     [CEReactions, RaisesException=Setter] attribute long maxLength;
     [CEReactions, RaisesException=Setter] attribute long minLength;
     [CEReactions, Reflect] attribute DOMString name;
     [CEReactions, Reflect] attribute DOMString placeholder;
     [CEReactions, Reflect] attribute boolean readOnly;
     [CEReactions, Reflect] attribute boolean required;
     [CEReactions] attribute unsigned long rows;
     [CEReactions, Reflect] attribute DOMString wrap;
 
     readonly attribute DOMString type;
@@ skipping 24 matching lines @@
     // should not be optional.
     [ImplementedAs=setSelectionRangeForBinding]
     void setSelectionRange([Default=Undefined] optional long start,
                            [Default=Undefined] optional long end,
                            optional DOMString direction);
 
     // HTML autocapitalize proposal
     // https://github.com/mounirlamouri/html-autocapitalize/blob/master/proposal.md
     [Measure] attribute DOMString autocapitalize;
 };