Don't ignore landmark and related AXObjects, because they should be exposed to

Source/core/accessibility/AXRenderObject.cpp

 /*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 633 matching lines @@
         }
 
         // text elements that are just empty whitespace should not be returned
         // FIXME(dmazzoni): we probably shouldn't ignore this if the style is 'pre', or similar...
         return renderText->text().impl()->containsOnlyWhitespace();
     }
 
     if (isHeading())
         return false;
 
+    if (isLandmarkRelated())
+        return false;
+
     if (isLink())
         return false;
 
     // all controls are accessible
     if (isControl())
         return false;
 
     if (ariaRoleAttribute() != UnknownRole)
         return false;
 
@@ skipping 1695 matching lines @@
         if (label && label->renderer()) {
             LayoutRect labelRect = axObjectCache()->getOrCreate(label)->elementRect();
             result.unite(labelRect);
         }
     }
 
     return result;
 }
 
 } // namespace WebCore