Rename gfx::Display/Screen to display::Display/Screen in ash

ash/system/chromeos/audio/tray_audio_chromeos.cc

Index: ash/system/chromeos/audio/tray_audio_chromeos.cc
diff --git a/ash/system/chromeos/audio/tray_audio_chromeos.cc b/ash/system/chromeos/audio/tray_audio_chromeos.cc
index 1a99133cba8ecbc4a0e5cefd02796073422e97c1..9cf6b87c65d254697fe83798d2198fe155cd088d 100644
--- a/ash/system/chromeos/audio/tray_audio_chromeos.cc
+++ b/ash/system/chromeos/audio/tray_audio_chromeos.cc
@@ -59,7 +59,7 @@ void TrayAudioChromeOs::DestroyDetailedView() {
   }
 }
 
-void TrayAudioChromeOs::OnDisplayAdded(const gfx::Display& new_display) {
+void TrayAudioChromeOs::OnDisplayAdded(const display::Display& new_display) {
   TrayAudio::OnDisplayAdded(new_display);
 
   // This event will be triggered when the lid of the device is opened to exit
@@ -68,7 +68,7 @@ void TrayAudioChromeOs::OnDisplayAdded(const gfx::Display& new_display) {
   audio_delegate_->SetActiveHDMIOutoutRediscoveringIfNecessary(true);
 }
 
-void TrayAudioChromeOs::OnDisplayRemoved(const gfx::Display& old_display) {
+void TrayAudioChromeOs::OnDisplayRemoved(const display::Display& old_display) {
   TrayAudio::OnDisplayRemoved(old_display);
 
   // This event will be triggered when the lid of the device is closed to enter
@@ -77,7 +77,7 @@ void TrayAudioChromeOs::OnDisplayRemoved(const gfx::Display& old_display) {
   audio_delegate_->SetActiveHDMIOutoutRediscoveringIfNecessary(true);
 }
 
-void TrayAudioChromeOs::OnDisplayMetricsChanged(const gfx::Display& display,
+void TrayAudioChromeOs::OnDisplayMetricsChanged(const display::Display& display,
                                                 uint32_t changed_metrics) {
   // The event could be triggered multiple times during the HDMI display
   // transition, we don't need to restart HDMI re-discovering grace period