Forward BrowserAccessibility get_accRole to AXPlatformNode.

content/browser/accessibility/browser_accessibility_com_win.cc

 // Copyright (c) 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 "content/browser/accessibility/browser_accessibility_com_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include <algorithm>
@@ skipping 615 matching lines @@
 
   return AXPlatformNodeWin::get_accParent(disp_parent);
 }
 
 STDMETHODIMP BrowserAccessibilityComWin::get_accRole(VARIANT var_id,
                                                      VARIANT* role) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_GET_ACC_ROLE);
   if (!owner())
     return E_FAIL;
 
-  if (!role)
-    return E_INVALIDARG;
-
-  BrowserAccessibilityComWin* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  if (!target->role_name().empty()) {
-    role->vt = VT_BSTR;
-    role->bstrVal = SysAllocString(target->role_name().c_str());
-  } else {
-    role->vt = VT_I4;
-    role->lVal = target->ia_role();
-  }
-  return S_OK;
+  return AXPlatformNodeWin::get_accRole(var_id, role);
 }
 
 STDMETHODIMP BrowserAccessibilityComWin::get_accState(VARIANT var_id,
                                                       VARIANT* state) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_GET_ACC_STATE);
   if (!owner())
     return E_FAIL;
 
   auto* manager = Manager();
   if (!manager)
@@ skipping 4973 matching lines @@
 
 BrowserAccessibilityComWin* ToBrowserAccessibilityComWin(
     BrowserAccessibility* obj) {
   if (!obj || !obj->IsNative())
     return nullptr;
   auto* result = static_cast<BrowserAccessibilityWin*>(obj)->GetCOM();
   return result;
 }
 
 }  // namespace content