Move browser-to-renderer opener plumbing to frame routing IDs

content/browser/frame_host/frame_tree.cc

Index: content/browser/frame_host/frame_tree.cc
diff --git a/content/browser/frame_host/frame_tree.cc b/content/browser/frame_host/frame_tree.cc
index 680766435dbd5e742122d3188d7b2ea56a94e022..2bc147dc27d4670324efc627ae24699567825e48 100644
--- a/content/browser/frame_host/frame_tree.cc
+++ b/content/browser/frame_host/frame_tree.cc
@@ -231,8 +231,8 @@ void FrameTree::CreateProxiesForSiteInstance(
         root()->render_manager()->CreateRenderFrameProxy(site_instance);
       } else {
         root()->render_manager()->CreateRenderFrame(
-            site_instance, nullptr, MSG_ROUTING_NONE,
-            CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN, nullptr);
+            site_instance, nullptr, CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN,
+            nullptr);
       }
     } else {
       root()->render_manager()->EnsureRenderViewInitialized(render_view_host,