Improve the notifications sent from AXTree updates.

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 "content/browser/accessibility/browser_accessibility_manager.h"
@@ skipping 13 matching lines @@
 
   BrowserAccessibility* GetFocus(BrowserAccessibility* root) override;
 
   // Implementation of BrowserAccessibilityManager.
   void NotifyAccessibilityEvent(ui::AXEvent event_type,
                                 BrowserAccessibility* node) override;
 
   NSView* parent_view() { return parent_view_; }
 
  private:
-  void OnNodeCreationFinished(ui::AXNode* node) override;
-  void OnTreeUpdateFinished() override;
+  void OnAtomicUpdateFinished(
+      bool root_changed,
+      const std::vector<ui::AXTreeDelegate::Change>& changes) override;
 
   // This gives BrowserAccessibilityManager::Create access to the class
   // constructor.
   friend class BrowserAccessibilityManager;
 
   NSView* parent_view_;
 
-  bool created_live_region_;
-
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerMac);
 };
 
 }
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_MAC_H_