Improve support for multiselect list box accessibility on Windows.

content/browser/accessibility/browser_accessibility.h

 // 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.
 
 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #pragma once
 
 #include <map>
 #include <utility>
@@ skipping 204 matching lines @@
 
   // Retrieve the value of a string attribute from the attribute map and
   // returns true if found.
   bool GetStringAttribute(WebAccessibility::StringAttribute attribute,
                           string16* value) const;
 
   // Retrieve the value of a html attribute from the attribute map and
   // returns true if found.
   bool GetHtmlAttribute(const char* attr, string16* value) const;
 
+  // Returns true if the bit corresponding to the given state enum is 1.
+  bool HasState(WebAccessibility::State state_enum) const;
+
   // Returns true if this node is an editable text field of any kind.
   bool IsEditableText() const;
 
   // Append the text from this node and its children.
   string16 GetTextRecursive() const;
 
  protected:
   BrowserAccessibility();
 
   // The manager of this tree of accessibility objects; needed for
@@ skipping 40 matching lines @@
   // tree, a client may still be holding onto a pointer to this object, so
   // we mark it as inactive so that calls to any of this object's methods
   // immediately return failure.
   bool instance_active_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_