Convert Pass()→std::move() in //ash

ash/display/mirror_window_controller.cc

Index: ash/display/mirror_window_controller.cc
diff --git a/ash/display/mirror_window_controller.cc b/ash/display/mirror_window_controller.cc
index 7daadcef9a8f2887ded0a07b02317b65111ddc15..df5717438c47d26829f300773bb591d903e44920 100644
--- a/ash/display/mirror_window_controller.cc
+++ b/ash/display/mirror_window_controller.cc
@@ -4,6 +4,8 @@
 
 #include "ash/display/mirror_window_controller.h"
 
+#include <utility>
+
 #if defined(USE_X11)
 #include <X11/Xlib.h>
 #include <X11/extensions/XInput2.h>
@@ -226,7 +228,7 @@ void MirrorWindowController::UpdateWindow(
           new aura::Window(nullptr);
       mirror_window->Init(ui::LAYER_SOLID_COLOR);
       host->window()->AddChild(mirror_window);
-      host_info->ash_host->SetRootWindowTransformer(transformer.Pass());
+      host_info->ash_host->SetRootWindowTransformer(std::move(transformer));
       mirror_window->SetBounds(host->window()->bounds());
       mirror_window->Show();
       if (reflector_) {
@@ -242,7 +244,7 @@ void MirrorWindowController::UpdateWindow(
           mirroring_host_info_map_[display_info.id()]->ash_host.get();
       aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
       GetRootWindowSettings(host->window())->display_id = display_info.id();
-      ash_host->SetRootWindowTransformer(transformer.Pass());
+      ash_host->SetRootWindowTransformer(std::move(transformer));
       host->SetBounds(display_info.bounds_in_native());
     }
   }