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();

[David Tseng, 2014/05/09 03:09:47]

FYI; I forgot that the BAC creates its children (and keeps it as a property).
This method, therefore, would be more appropriately named RecreateNativeSubtree.

[dmazzoni, 2014/05/09 06:10:30]

Oh! Good thought.

Better idea, let's preserve the children? I added some code to swap the
children, could you take another look?

Unfortunately this doesn't make VO stay on static text, but it seems it ought to
be a bit more efficient, right?

+
  private:
   // This gives BrowserAccessibility::Create access to the class constructor.
   friend class BrowserAccessibility;