Use multiline attribute to check for IA2_STATE_MULTILINE.

chrome/common/extensions/api/automation.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The <code>chrome.automation</code> API allows developers to access the
 // automation (accessibility) tree for the browser. The tree resembles the DOM
 // tree, but only exposes the <em>semantic</em> structure of a page. It can be
 // used to programmatically interact with a page by examining names, roles, and
 // states, listening for events, and performing actions on nodes.
 [nocompile] namespace automation {
@@ skipping 143 matching lines @@
     splitter,
     staticText,
     status,
     switch,
     tabGroup,
     tabList,
     tabPanel,
     tab,
     tableHeaderContainer,
     table,
-    textArea,
     textField,
     time,
     timer,
     titleBar,
     toggleButton,
     toolbar,
     treeGrid,
     treeItem,
     tree,
     unknown,
@@ skipping 14 matching lines @@
     enabled,   // content only
     expanded,
     focusable,
     focused,
     haspopup,
     horizontal,
     hovered,
     indeterminate,
     invisible,
     linked,
+    multiline,
     multiselectable,
     offscreen,
     pressed,
     protected,
     readOnly,
     required,
     selectable,
     selected,
     vertical,
     visited
@@ skipping 329 matching lines @@
     // Add a tree change observer. Tree change observers are static/global, they
     // listen to changes across all trees.
     [nocompile] static void addTreeChangeObserver(
         TreeChangeObserver observer);
 
     // Remove a tree change observer.
     [nocompile] static void removeTreeChangeObserver(
         TreeChangeObserver observer);
   };
 };