Add custom action support

chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc

Index: chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc
diff --git a/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc b/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc
index 8a6b0d992df535468c08df42d53b4d42ef7198a6..f338b59a4878162e91826c3a7cb2d6161d9089d9 100644
--- a/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc
+++ b/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.cc
@@ -205,6 +205,13 @@ void ArcAccessibilityHelperBridge::OnAccessibilityEvent(
 
 void ArcAccessibilityHelperBridge::OnAction(
     const ui::AXActionData& data) const {
+  if (data.action == ui::AX_ACTION_CUSTOM_ACTION) {
+    auto* instance = ARC_GET_INSTANCE_FOR_METHOD(
+        arc_bridge_service()->accessibility_helper(), PerformCustomAction);
+    instance->PerformCustomAction(data.target_node_id, data.custom_action_id);
+    return;
+  }
+
   arc::mojom::AccessibilityActionType mojo_action;
   switch (data.action) {
     case ui::AX_ACTION_DO_DEFAULT: