Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

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 3e94bbebd176f41e619783a5d6cc56e70dd29286..c8154ee14704fb5b3a860b3c215c7e4961210e2e 100644
--- a/content/browser/frame_host/frame_tree.cc
+++ b/content/browser/frame_host/frame_tree.cc
@@ -244,8 +244,7 @@ void FrameTree::CreateProxiesForSiteInstance(
         root()->render_manager()->CreateRenderFrameProxy(site_instance);
       } else {
         root()->render_manager()->CreateRenderFrame(
-            site_instance, nullptr, CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN,
-            nullptr);
+            site_instance, CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN, nullptr);
       }
     } else {
       root()->render_manager()->EnsureRenderViewInitialized(render_view_host,