OOPIF: History navigations for new child frames.

content/browser/frame_host/frame_navigation_entry.h

Index: content/browser/frame_host/frame_navigation_entry.h
diff --git a/content/browser/frame_host/frame_navigation_entry.h b/content/browser/frame_host/frame_navigation_entry.h
index fcbdb047745aecb9ca559a5a1a9ec415064bf8f5..b9734cb66deb08725c01d0832fc4a48607e15d10 100644
--- a/content/browser/frame_host/frame_navigation_entry.h
+++ b/content/browser/frame_host/frame_navigation_entry.h
@@ -55,6 +55,9 @@ class CONTENT_EXPORT FrameNavigationEntry
   // |frame_unique_name|, if we can move unique name computation to the browser
   // process.
   int frame_tree_node_id() const { return frame_tree_node_id_; }
+  void set_frame_tree_node_id(int frame_tree_node_id) {
+    frame_tree_node_id_ = frame_tree_node_id;
+  }
 
   // The unique name of the frame this entry is for.  This is a stable name for
   // the frame based on its position in the tree and relation to other named