Add hack so VoiceOver speaks updates to injected live regions.

content/browser/accessibility/browser_accessibility_mac.h

Index: content/browser/accessibility/browser_accessibility_mac.h
diff --git a/content/browser/accessibility/browser_accessibility_mac.h b/content/browser/accessibility/browser_accessibility_mac.h
index dc04484b67e97fefd1b38b10346e46f9a0397524..e1b5e384dc1b2cd50f8110b3255040319a62bc9a 100644
--- a/content/browser/accessibility/browser_accessibility_mac.h
+++ b/content/browser/accessibility/browser_accessibility_mac.h
@@ -27,6 +27,11 @@ class BrowserAccessibilityMac : public BrowserAccessibility {
     return browser_accessibility_cocoa_;
   }
 
+  // Detach the BrowserAccessibilityCocoa object and then recreate it.
+  // This is only used to work around VoiceOver bugs by forcing VoiceOver
+  // to rebuild its internal state.
+  void RecreateNativeObject();
+
  private:
   // This gives BrowserAccessibility::Create access to the class constructor.
   friend class BrowserAccessibility;