Implement AXPlatformNodeWin::get_indexInParent

ui/accessibility/platform/ax_platform_node_win.cc

 // Copyright 2015 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 <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 554 matching lines @@
   // http://www.linuxfoundation.org/collaborate/workgroups/accessibility/ia2/ia2_implementation_guide
   if (GetData().role == ui::AX_ROLE_TEXT_FIELD) {
     attributes_str = L"text-model:a1;";
   }
 
   *attributes = SysAllocString(attributes_str.c_str());
   DCHECK(*attributes);
   return S_OK;
 }
 
+STDMETHODIMP AXPlatformNodeWin::get_indexInParent(LONG* index_in_parent) {
+  COM_OBJECT_VALIDATE_1_ARG(index_in_parent);
+  *index_in_parent = GetIndexInParent();
+  if (*index_in_parent < 0)
+    return E_FAIL;
+
+  return S_OK;
+}
+
 //
 // IAccessibleText
 //
 
 STDMETHODIMP AXPlatformNodeWin::get_nCharacters(LONG* n_characters) {
   COM_OBJECT_VALIDATE_1_ARG(n_characters);
   base::string16 text = TextForIAccessibleText();
   *n_characters = static_cast<LONG>(text.size());
 
   return S_OK;
@@ skipping 391 matching lines @@
     LONG start_offset,
     ui::TextBoundaryDirection direction) {
   HandleSpecialTextOffset(text, &start_offset);
   ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary);
   std::vector<int32> line_breaks;
   return static_cast<LONG>(ui::FindAccessibleTextBoundary(
       text, line_breaks, boundary, start_offset, direction));
 }
 
 }  // namespace ui