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 141730523713f1a2fc6c09ff47f7a32f55f27755..535ea8c3c631085d2e88b03d3bd00f65589d3d3b 100644
--- a/content/renderer/accessibility/blink_ax_tree_source.h
+++ b/content/renderer/accessibility/blink_ax_tree_source.h
@@ -19,6 +19,14 @@ class BlinkAXTreeSource
   BlinkAXTreeSource(RenderViewImpl* render_view);
   virtual ~BlinkAXTreeSource();
 
+  // Call this to have BlinkAXTreeSource collect a mapping from
+  // node ids to the guest instance id (for a <webview> plug-in)
+  // or frame routing id (for an out-of-process iframe) during
+  // calls to SerializeNode.
+  void CollectChildFrameIdMapping(
+      std::map<int32, int>* guest_instance_ids,
+      std::map<int32, int>* frame_routing_ids);
+
   // AXTreeSource implementation.
   virtual blink::WebAXObject GetRoot() const OVERRIDE;
   virtual blink::WebAXObject GetFromId(int32 id) const OVERRIDE;
@@ -39,6 +47,8 @@ class BlinkAXTreeSource
 
  private:
   RenderViewImpl* render_view_;
+  std::map<int32, int>* guest_instance_ids_;
+  std::map<int32, int>* frame_routing_ids_;
 };
 
 }  // namespace content