Make use of new AX name calc in Chromium.

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 404 matching lines @@
     VARIANT var_id, VARIANT* state) {
   COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, state);
   state->vt = VT_I4;
   state->lVal = MSAAState();
   return S_OK;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_accHelp(
     VARIANT var_id, BSTR* help) {
   COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, help);
-  return GetStringAttributeAsBstr(ui::AX_ATTR_HELP, help);
+  return S_FALSE;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_accValue(VARIANT var_id, BSTR* value) {
   COM_OBJECT_VALIDATE_VAR_ID_1_ARG(var_id, value);
   return GetStringAttributeAsBstr(ui::AX_ATTR_VALUE, value);
 }
 
 STDMETHODIMP AXPlatformNodeWin::put_accValue(VARIANT var_id,
                                              BSTR new_value) {
   COM_OBJECT_VALIDATE_VAR_ID(var_id);
@@ skipping 666 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