Generalize the HIT_TEST accessibility action so that it can send any event.

chrome/browser/extensions/api/automation_internal/automation_internal_api.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 "chrome/browser/extensions/api/automation_internal/automation_internal_api.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
@@ skipping 331 matching lines @@
     case api::automation_internal::ACTION_TYPE_GETIMAGEDATA: {
       api::automation_internal::GetImageDataParams get_image_data_params;
       EXTENSION_FUNCTION_VALIDATE(
           api::automation_internal::GetImageDataParams::Populate(
               params->opt_args.additional_properties, &get_image_data_params));
       action->action = ui::AX_ACTION_GET_IMAGE_DATA;
       action->target_rect = gfx::Rect(0, 0, get_image_data_params.max_width,
                                       get_image_data_params.max_height);
       break;
     }
+    case api::automation_internal::ACTION_TYPE_HITTEST: {
+      api::automation_internal::HitTestParams hit_test_params;
+      EXTENSION_FUNCTION_VALIDATE(
+          api::automation_internal::HitTestParams::Populate(
+              params->opt_args.additional_properties, &hit_test_params));
+      action->action = ui::AX_ACTION_HIT_TEST;
+      action->target_point = gfx::Point(hit_test_params.x, hit_test_params.y);
+      for (int event_index = ui::AX_EVENT_NONE + 1;
+           event_index <= ui::AX_EVENT_LAST; ++event_index) {
+        ui::AXEvent event = static_cast<ui::AXEvent>(event_index);
+        if (ui::ToString(event) == hit_test_params.event_to_fire)

[David Tseng, 2017/03/22 15:40:28]

Pretty sure you can do ParseEvent here.

[dmazzoni, 2017/03/23 16:29:30]

Done.

+          action->hit_test_event_to_fire = event;
+      }
+      if (action->hit_test_event_to_fire == ui::AX_EVENT_NONE)
+        return RespondNow(NoArguments());
+      break;
+    }
     case api::automation_internal::ACTION_TYPE_MAKEVISIBLE:
       action->action = ui::AX_ACTION_SCROLL_TO_MAKE_VISIBLE;
       break;
     case api::automation_internal::ACTION_TYPE_SETSELECTION: {
       api::automation_internal::SetSelectionParams selection_params;
       EXTENSION_FUNCTION_VALIDATE(
           api::automation_internal::SetSelectionParams::Populate(
               params->opt_args.additional_properties, &selection_params));
       action->anchor_node_id = params->args.automation_node_id;
       action->anchor_offset = selection_params.anchor_offset;
@@ skipping 147 matching lines @@
     int result_acc_obj_id) {
   if (!error.empty()) {
     Respond(Error(error));
     return;
   }
 
   Respond(OneArgument(base::MakeUnique<base::Value>(result_acc_obj_id)));
 }
 
 }  // namespace extensions