Try |View::HandleAccessibleAction| before falling back to fixed actions.

ui/views/accessibility/ax_view_obj_wrapper.cc

 // Copyright 2014 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 "ui/views/accessibility/ax_view_obj_wrapper.h"
 
 #include "base/strings/utf_string_conversions.h"
-#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_action_data.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/events/event_utils.h"
 #include "ui/views/accessibility/ax_aura_obj_cache.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace views {
 
 AXViewObjWrapper::AXViewObjWrapper(View* view)  : view_(view) {
   if (view->GetWidget())
@@ skipping 65 matching lines @@
 
 void AXViewObjWrapper::SetSelection(int32_t start, int32_t end) {
   // TODO(dtseng): Implement.
 }
 
 void AXViewObjWrapper::ShowContextMenu() {
   view_->ShowContextMenu(view_->bounds().CenterPoint(),
                          ui::MENU_SOURCE_KEYBOARD);
 }
 
+bool AXViewObjWrapper::HandleAccessibleAction(const ui::AXActionData& action) {
+  return view_->HandleAccessibleAction(action);
+}
+
 }  // namespace views