Cross-process iframe accessibility.

content/renderer/accessibility/blink_ax_tree_source.h

Index: content/renderer/accessibility/blink_ax_tree_source.h
diff --git a/content/renderer/accessibility/blink_ax_tree_source.h b/content/renderer/accessibility/blink_ax_tree_source.h
index 007df071052f54192146ba5178236b13212c0ab0..c58ee81a6e85923c5066fa83a358c6a82e2c6bd1 100644
--- a/content/renderer/accessibility/blink_ax_tree_source.h
+++ b/content/renderer/accessibility/blink_ax_tree_source.h
@@ -19,6 +19,12 @@ class BlinkAXTreeSource
   BlinkAXTreeSource(RenderFrameImpl* render_frame);
   virtual ~BlinkAXTreeSource();
 
+  // Call this to have BlinkAXTreeSource collect a mapping from
+  // node ids to the frame routing id for an out-of-process iframe during
+  // calls to SerializeNode.
+  void CollectChildFrameIdMapping(
+      std::map<int32, int>* node_to_frame_routing_id_map);
+
   // Walks up the ancestor chain to see if this is a descendant of the root.
   bool IsInTree(blink::WebAXObject node) const;
 
@@ -42,6 +48,8 @@ class BlinkAXTreeSource
 
  private:
   RenderFrameImpl* render_frame_;
+  std::map<int32, int>* node_to_frame_routing_id_map_;
+
 };
 
 }  // namespace content