Remove dependency on SurfaceManager in FrameGenerator

services/ui/ws/window_tree_host_factory.cc

Index: services/ui/ws/window_tree_host_factory.cc
diff --git a/services/ui/ws/window_tree_host_factory.cc b/services/ui/ws/window_tree_host_factory.cc
index 37681caa6346032ab868f87402c261647624efde..bb650a456d4018005846e30b3423807bcfe1536b 100644
--- a/services/ui/ws/window_tree_host_factory.cc
+++ b/services/ui/ws/window_tree_host_factory.cc
@@ -4,7 +4,6 @@
 
 #include "services/ui/ws/window_tree_host_factory.h"
 
-#include "services/ui/surfaces/display_compositor.h"
 #include "services/ui/ws/display.h"
 #include "services/ui/ws/display_binding.h"
 #include "services/ui/ws/window_server.h"
@@ -19,8 +18,6 @@ WindowTreeHostFactory::WindowTreeHostFactory(WindowServer* window_server,
   platform_display_init_params_.metrics.bounds.set_height(768);
   platform_display_init_params_.metrics.pixel_size.SetSize(1024, 768);
   platform_display_init_params_.metrics.device_scale_factor = 1.0f;
-  platform_display_init_params_.display_compositor =
-      window_server_->GetDisplayCompositor();
 }
 
 WindowTreeHostFactory::~WindowTreeHostFactory() {}