Add custom action support

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

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
@@ skipping 190 matching lines @@
   if (event_data->event_type !=
       arc::mojom::AccessibilityEventType::VIEW_FOCUSED)
     return;
 
   CHECK_EQ(1U, event_data.get()->node_data.size());
   DispatchFocusChange(event_data.get()->node_data[0].get());
 }
 
 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:
       mojo_action = arc::mojom::AccessibilityActionType::CLICK;
       break;
     default:
       return;
   }
 
   auto* instance = ARC_GET_INSTANCE_FOR_METHOD(
@@ skipping 46 matching lines @@
       break;
     }
   }
 }
 
 void ArcAccessibilityHelperBridge::OnTaskSetActive(int32_t task_id) {
   current_task_id_ = task_id;
 }
 
 }  // namespace arc