Expose correct semantics for HTML5 footer element on mac and windows platforms, as per https://bugs…

webkit/glue/webaccessibility.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 "webkit/glue/webaccessibility.h"
 
 #include <set>
 
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 89 matching lines @@
     case WebKit::WebAccessibilityRoleDocumentMath:
       return WebAccessibility::ROLE_MATH;
     case WebKit::WebAccessibilityRoleDocumentNote:
       return WebAccessibility::ROLE_NOTE;
     case WebKit::WebAccessibilityRoleDocumentRegion:
       return WebAccessibility::ROLE_REGION;
     case WebKit::WebAccessibilityRoleDrawer:
       return WebAccessibility::ROLE_DRAWER;
     case WebKit::WebAccessibilityRoleEditableText:
       return WebAccessibility::ROLE_EDITABLE_TEXT;
+    case WebKit::WebAccessibilityRoleFooter:
+      return WebAccessibility::ROLE_FOOTER;
     case WebKit::WebAccessibilityRoleGrid:
       return WebAccessibility::ROLE_GRID;
     case WebKit::WebAccessibilityRoleGroup:
       return WebAccessibility::ROLE_GROUP;
     case WebKit::WebAccessibilityRoleGrowArea:
       return WebAccessibility::ROLE_GROW_AREA;
     case WebKit::WebAccessibilityRoleHeading:
       return WebAccessibility::ROLE_HEADING;
     case WebKit::WebAccessibilityRoleHelpTag:
       return WebAccessibility::ROLE_HELP_TAG;
@@ skipping 832 matching lines @@
 bool WebAccessibility::IsParentUnignoredOf(
     const WebKit::WebAccessibilityObject& ancestor,
     const WebKit::WebAccessibilityObject& child) {
   WebKit::WebAccessibilityObject parent = child.parentObject();
   while (!parent.isNull() && parent.accessibilityIsIgnored())
     parent = parent.parentObject();
   return parent.equals(ancestor);
 }
 
 }  // namespace webkit_glue