Test aria-pressed=mixed on windows

content/browser/accessibility/browser_accessibility_manager_mac.h

 // Copyright (c) 2012 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_MANAGER_MAC_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 #include <stdint.h>
 
@@ skipping 31 matching lines @@
   void OnAccessibilityEvents(
       const std::vector<AXEventNotificationDetails>& details) override;
 
   NSView* GetParentView();
 
  private:
   // AXTreeDelegate methods.
   void OnNodeDataWillChange(ui::AXTree* tree,
                             const ui::AXNodeData& old_node_data,
                             const ui::AXNodeData& new_node_data) override;
-  void OnStateChanged(ui::AXTree* tree,
-                      ui::AXNode* node,
-                      ui::AXState state,
-                      bool new_value) override;
 
   // Returns an autoreleased object.
   NSDictionary* GetUserInfoForSelectedTextChangedNotification();
 
   // Returns an autoreleased object.
   NSDictionary* GetUserInfoForValueChangedNotification(
       const BrowserAccessibilityCocoa* native_node,
       const base::string16& deleted_text,
       const base::string16& inserted_text) const;
 
   // This gives BrowserAccessibilityManager::Create access to the class
   // constructor.
   friend class BrowserAccessibilityManager;
 
   // Keeps track of any edits that have been made by the user during a tree
   // update. Used by NSAccessibilityValueChangedNotification.
   // Maps AXNode IDs to name or value attribute changes.
   std::map<int32_t, base::string16> text_edits_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerMac);
 };
 
 }
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_MAC_H_