Improve support for multiselect list box accessibility on Windows.

webkit/glue/webaccessibility.cc

 // Copyright (c) 2011 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.
 
 #include "webkit/glue/webaccessibility.h"
 
 #include <set>
 
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 783 matching lines @@
     int_attributes[ATTR_TITLE_UI_ELEMENT] = src.titleUIElement().axID();
   if (!src.url().isEmpty())
     string_attributes[ATTR_URL] = src.url().spec().utf16();
 
   if (role == ROLE_TREE_ITEM)
     int_attributes[ATTR_HIERARCHICAL_LEVEL] = src.hierarchicalLevel();
 
   if (role == ROLE_SLIDER)
     include_children = false;
 
+  // Treat the active list box item as focused.
+  if (role == ROLE_LISTBOX_OPTION && src.isSelectedOptionActive())
+    state |= (1 << WebAccessibility::STATE_FOCUSED);
+
   WebKit::WebNode node = src.node();
   bool is_iframe = false;
 
   if (!node.isNull() && node.isElementNode()) {
     WebKit::WebElement element = node.to<WebKit::WebElement>();
     is_iframe = (element.tagName() == ASCIIToUTF16("IFRAME"));
 
     // TODO(ctguil): The tagName in WebKit is lower cased but
     // HTMLElement::nodeName calls localNameUpper. Consider adding
     // a WebElement method that returns the original lower cased tagName.
@@ skipping 188 matching lines @@
 bool WebAccessibility::IsParentUnignoredOf(
     const WebKit::WebAccessibilityObject& ancestor,
     const WebKit::WebAccessibilityObject& child) {
   WebKit::WebAccessibilityObject parent = child.parentObject();
   while (!parent.isNull() && parent.accessibilityIsIgnored())
     parent = parent.parentObject();
   return parent.equals(ancestor);
 }
 
 }  // namespace webkit_glue