Wire up an api to darken screen for accessibility

chrome/browser/extensions/api/automation_internal/automation_internal_api.cc

Index: chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
diff --git a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
index 108c09d772ae6a35b034acce3189def6b28366f6..207ad319406bc9b9fef52aad71b021262a351454 100644
--- a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
+++ b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
@@ -378,6 +378,16 @@ AutomationInternalPerformActionFunction::ConvertToAXActionData(
           ui::AX_ACTION_SET_SEQUENTIAL_FOCUS_NAVIGATION_STARTING_POINT;
       break;
     }
+    case api::automation_internal::ACTION_TYPE_TOGGLEDARKENSCREEN: {
+      action->action = ui::AX_ACTION_TOGGLE_DARKEN_SCREEN;
+      api::automation_internal::ToggleDarkenScreenParams darken_params;
+      EXTENSION_FUNCTION_VALIDATE(
+          api::automation_internal::ToggleDarkenScreenParams::Populate(
+              params->opt_args.additional_properties, &darken_params));
+      action->AddBoolAttribute(ui::AX_ACTION_ATTR_DARKEN_SCREEN,
+                               darken_params.darken_screen);
+      break;
+    }
     default:
       NOTREACHED();
   }