[WIP] Move ownership of PlatformDisplay from ws::Display to ws::WindowServer

services/ui/ws/display.cc

Index: services/ui/ws/display.cc
diff --git a/services/ui/ws/display.cc b/services/ui/ws/display.cc
index 68e8657c2bf4f484cbd97736792965bf2f3bbdc3..fdf2ddb63766a636d79684d26678063839f8bb13 100644
--- a/services/ui/ws/display.cc
+++ b/services/ui/ws/display.cc
@@ -58,6 +58,9 @@ Display::~Display() {
                                     ->second->window_manager_state()
                                     ->window_tree());
   }
+
+  if (platform_display_)
+    window_server_->RemovePlatformDisplay(platform_display_);
 }
 
 void Display::Init(const PlatformDisplayInitParams& init_params,
@@ -69,8 +72,11 @@ void Display::Init(const PlatformDisplayInitParams& init_params,
   PlatformDisplayInitParams params_copy = init_params;
   params_copy.root_window = root_.get();
 
-  platform_display_ = PlatformDisplay::Create(params_copy);
+  std::unique_ptr<PlatformDisplay> platform_display =
+      PlatformDisplay::Create(params_copy);
+  platform_display_ = platform_display.get();
   platform_display_->Init(this);
+  window_server_->AddPlatformDisplay(std::move(platform_display));
 }
 
 int64_t Display::GetId() const {