Add a helper function and update test results with ax role of table header.

content/browser/accessibility/browser_accessibility.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.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 645 matching lines @@
   if (EqualsASCII(value, "mixed"))
     *is_mixed = true;
 
   return false;  // Not set
 }
 
 bool BrowserAccessibility::HasState(ui::AXState state_enum) const {
   return (GetState() >> state_enum) & 1;
 }
 
+bool BrowserAccessibility::IsCellOrTableHeaderRole() const {
+  return (GetRole() == ui::AX_ROLE_CELL ||
+          GetRole() == ui::AX_ROLE_COLUMN_HEADER ||
+          GetRole() == ui::AX_ROLE_ROW_HEADER);
+}
+
 bool BrowserAccessibility::IsEditableText() const {
   // These roles don't have readonly set, but they're not editable text.
   if (GetRole() == ui::AX_ROLE_SCROLL_AREA ||
       GetRole() == ui::AX_ROLE_COLUMN ||
       GetRole() == ui::AX_ROLE_TABLE_HEADER_CONTAINER) {
     return false;
   }
 
   // Note: WebAXStateReadonly being false means it's either a text control,
   // or contenteditable. We also check for editable text roles to cover
@@ skipping 35 matching lines @@
   if (GetRole() == ui::AX_ROLE_STATIC_TEXT)
     return static_cast<int>(GetStringAttribute(ui::AX_ATTR_VALUE).size());
 
   int len = 0;
   for (size_t i = 0; i < InternalChildCount(); ++i)
     len += InternalGetChild(i)->GetStaticTextLenRecursive();
   return len;
 }
 
 }  // namespace content