Replicate whether a frame is in a document or shadow tree.

content/public/test/mock_render_thread.cc

Index: content/public/test/mock_render_thread.cc
diff --git a/content/public/test/mock_render_thread.cc b/content/public/test/mock_render_thread.cc
index 40b3046f326d1e05d3d47c875682fd9270e4f2f1..0aa70f0ce9b896351f8aae707c4d7bcca9d10f00 100644
--- a/content/public/test/mock_render_thread.cc
+++ b/content/public/test/mock_render_thread.cc
@@ -226,6 +226,7 @@ void MockRenderThread::OnCreateWindow(
 
 // The Frame expects to be returned a valid route_id different from its own.
 void MockRenderThread::OnCreateChildFrame(int new_frame_routing_id,
+                                          blink::WebTreeScopeType scope,
                                           const std::string& frame_name,
                                           SandboxFlags sandbox_flags,
                                           int* new_render_frame_id) {