Test aria-pressed=mixed on windows

ash/system/night_light/night_light_toggle_button.cc

Index: ash/system/night_light/night_light_toggle_button.cc
diff --git a/ash/system/night_light/night_light_toggle_button.cc b/ash/system/night_light/night_light_toggle_button.cc
index ca3eb6e9ea49ad6d0df04011b73b326299f8766d..0b9af5c5d8b4aef5c576b4a1afe86f209a6ff769 100644
--- a/ash/system/night_light/night_light_toggle_button.cc
+++ b/ash/system/night_light/night_light_toggle_button.cc
@@ -61,7 +61,8 @@ void NightLightToggleButton::GetAccessibleNodeData(ui::AXNodeData* node_data) {
       l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_NIGHT_LIGHT));
   node_data->role = ui::AX_ROLE_TOGGLE_BUTTON;
   if (Shell::Get()->night_light_controller()->GetEnabled())
-    node_data->AddState(ui::AX_STATE_PRESSED);
+    node_data->AddIntAttribute(ui::AX_ATTR_PRESSED_STATE,
+                               ui::AX_BUTTON_STATE_TRUE);
 }
 
 }  // namespace ash