Attempted to fix crash in BrowserAccessibilityWin::RemoveBidirectionalRelation.

content/browser/accessibility/browser_accessibility_win_unittest.cc

 // Copyright (c) 2012 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 "content/browser/accessibility/browser_accessibility_win.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 2323 matching lines @@
   base::win::ScopedComPtr<IDispatch> result;
   EXPECT_EQ(E_INVALIDARG, ToBrowserAccessibilityWin(child)->get_accChild(
       root_unique_id_variant, result.Receive()));
 
   base::win::ScopedVariant child_unique_id_variant(-child->unique_id());
   EXPECT_EQ(S_OK, ToBrowserAccessibilityWin(root)->get_accChild(
       child_unique_id_variant, result.Receive()));
 }
 
 TEST_F(BrowserAccessibilityTest, TestIAccessible2Relations) {
-  std::vector<int32_t> describedby_ids = {2, 3};
   ui::AXNodeData root;
   root.id = 1;
   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
+  // Reflexive relations should be ignored.
+  std::vector<int32_t> describedby_ids = {1, 2, 3};
   root.AddIntListAttribute(ui::AX_ATTR_DESCRIBEDBY_IDS, describedby_ids);
 
   ui::AXNodeData child1;
   child1.id = 2;
   child1.role = ui::AX_ROLE_STATIC_TEXT;
   root.child_ids.push_back(2);
 
   ui::AXNodeData child2;
   child2.id = 3;
   child2.role = ui::AX_ROLE_STATIC_TEXT;
@@ skipping 107 matching lines @@
   std::vector<AXEventNotificationDetails> events = {event};
   manager->OnAccessibilityEvents(events);
 
   EXPECT_HRESULT_SUCCEEDED(ax_child1->get_nRelations(&n_relations));
   EXPECT_EQ(2, n_relations);
   EXPECT_HRESULT_SUCCEEDED(ax_child2->get_nRelations(&n_relations));
   EXPECT_EQ(2, n_relations);
 }
 
 }  // namespace content