MacViews a11y: Sync VoiceOver cursor with keyboard focus.

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 55cc02bb54da4eaa205df9f8adc17d5f84245279..5007ca55a457f85b06c03d268e42ff72dcf83a85 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -940,6 +940,10 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   // Accessibility -------------------------------------------------------------
 
+  // Gets the NativeViewAccessibility instance for this view, and creates one if
+  // it doesn't yet exist.
+  NativeViewAccessibility* GetNativeViewAccessibility();
+
   // Modifies |state| to reflect the current accessible state of this view.
   virtual void GetAccessibleState(ui::AXViewState* state) { }