mustash: Enable connections to mus from the Chrome renderer [take 2]

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 3b17ea0d15a56e5544b8bd2492366bfa42f917d4..6549226a4958d1a6ddd4f79adfc84d2e6c6e087a 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -114,6 +114,7 @@
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
+#include "content/renderer/render_widget_window_tree_client_factory.h"
 #include "content/renderer/renderer_blink_platform_impl.h"
 #include "content/renderer/scheduler/resource_dispatch_throttler.h"
 #include "content/renderer/service_worker/embedded_worker_dispatcher.h"
@@ -768,6 +769,10 @@ void RenderThreadImpl::Init() {
 
   service_registry()->AddService<EmbeddedWorkerSetup>(
       base::Bind(CreateEmbeddedWorkerSetup));
+
+#if defined(MOJO_SHELL_CLIENT)
+  CreateRenderWidgetWindowTreeClientFactory();
+#endif
 }
 
 RenderThreadImpl::~RenderThreadImpl() {