Change signature of OnConnect

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 84cbc9c9b54dffd5194e6dfa7c0a916259289b74..ceeac534f8a171be31e881f60998b0bf67afe166 100644
--- a/content/public/test/mock_render_thread.cc
+++ b/content/public/test/mock_render_thread.cc
@@ -190,7 +190,7 @@ MojoShellConnection* MockRenderThread::GetMojoShellConnection() {
 
 shell::InterfaceRegistry* MockRenderThread::GetInterfaceRegistry() {
   if (!interface_registry_)
-    interface_registry_.reset(new shell::InterfaceRegistry(nullptr));
+    interface_registry_.reset(new shell::InterfaceRegistry);
   return interface_registry_.get();
 }