Prevent bindings escalation on an existing NavigationEntry.

content/browser/web_contents/render_view_host_manager.h

Index: content/browser/web_contents/render_view_host_manager.h
diff --git a/content/browser/web_contents/render_view_host_manager.h b/content/browser/web_contents/render_view_host_manager.h
index 087d61c6a5db94be5e2934b5b64ce5465853ff0c..96cb2692a761917e169444670a77abc0701684da 100644
--- a/content/browser/web_contents/render_view_host_manager.h
+++ b/content/browser/web_contents/render_view_host_manager.h
@@ -141,6 +141,10 @@ class CONTENT_EXPORT RenderViewHostManager
                                    pending_and_current_web_ui_.get();
   }
 
+  // Sets the pending Web UI for the pending navigation, ensuring that the
+  // bindings are appropriate for the given NavigationEntry.
+  void SetPendingWebUI(const NavigationEntryImpl& entry);
+
   // Called when we want to instruct the renderer to navigate to the given
   // navigation entry. It may create a new RenderViewHost or re-use an existing
   // one. The RenderViewHost to navigate will be returned. Returns NULL if one