Revert "content: convert accessibility notifications to callbacks"

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 0a796342361161ee2b87dff133c13b2f4969ec7e..7d57852228eed7aa35d9390d22bdea8f6a2efc11 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -414,12 +414,6 @@ class CONTENT_EXPORT RenderViewHostImpl
                        int route_id,
                        const std::string& frame_tree);
 
-  // Set accessibility callbacks.
-  void SetAccessibilityLayoutCompleteCallbackForTesting(
-      const base::Closure& callback);
-  void SetAccessibilityLoadCompleteCallbackForTesting(
-      const base::Closure& callback);
-
   void set_save_accessibility_tree_for_testing(bool save) {
     save_accessibility_tree_for_testing_ = save;
   }
@@ -658,10 +652,6 @@ class CONTENT_EXPORT RenderViewHostImpl
   // callbacks.
   std::map<int, JavascriptResultCallback> javascript_callbacks_;
 
-  // Accessibility callbacks.
-  base::Closure accessibility_layout_callback_;
-  base::Closure accessibility_load_callback_;
-
   // True if the render view can be shut down suddenly.
   bool sudden_termination_allowed_;