Add hack so VoiceOver speaks updates to injected live regions.

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 11 matching lines @@
 
   static ui::AXTreeUpdate GetEmptyDocument();
 
   // Implementation of BrowserAccessibilityManager.
   virtual void NotifyAccessibilityEvent(
       ui::AXEvent event_type, BrowserAccessibility* node) OVERRIDE;
 
   NSView* parent_view() { return parent_view_; }
 
  private:
+  virtual void OnNodeCreationFinished(ui::AXNode* node) OVERRIDE;
+  virtual void OnUpdateFinished() 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_