Move gfx::Display/Screen to display::Display/Screen in aura/events

ui/aura/window_tree_host_platform.cc

Index: ui/aura/window_tree_host_platform.cc
diff --git a/ui/aura/window_tree_host_platform.cc b/ui/aura/window_tree_host_platform.cc
index a7ad83643367bd81622dd9029b2d21bf44202b2e..ee1a4268faa3f03a0486fc1a8f414e53491d2936 100644
--- a/ui/aura/window_tree_host_platform.cc
+++ b/ui/aura/window_tree_host_platform.cc
@@ -10,8 +10,8 @@
 #include "build/build_config.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/compositor.h"
+#include "ui/display/screen.h"
 #include "ui/events/event.h"
-#include "ui/gfx/screen.h"
 
 #if defined(OS_ANDROID)
 #include "ui/platform_window/android/platform_window_android.h"
@@ -125,7 +125,7 @@ void WindowTreeHostPlatform::OnCursorVisibilityChangedNative(bool show) {
 
 void WindowTreeHostPlatform::OnBoundsChanged(const gfx::Rect& new_bounds) {
   float current_scale = compositor()->device_scale_factor();
-  float new_scale = gfx::Screen::GetScreen()
+  float new_scale = display::Screen::GetScreen()
                         ->GetDisplayNearestWindow(window())
                         .device_scale_factor();
   gfx::Rect old_bounds = bounds_;