Optimize / clean up hasTagName() call sites

Source/core/accessibility/AXTable.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 126 matching lines @@
         if (elementHasAriaRole(bodyElement))
             return false;
     }
 
     RefPtrWillBeRawPtr<HTMLTableRowsCollection> rows = tableElement->rows();
     unsigned rowCount = rows->length();
     for (unsigned rowIndex = 0; rowIndex < rowCount; ++rowIndex) {
         Element* rowElement = rows->item(rowIndex);
         if (elementHasAriaRole(rowElement))
             return false;
-        if (rowElement->hasTagName(trTag)) {
+        if (isHTMLTableRowElement(*rowElement)) {
             RefPtrWillBeRawPtr<HTMLCollection> cells = toHTMLTableRowElement(rowElement)->cells();
             for (unsigned cellIndex = 0; cellIndex < cells->length(); ++cellIndex) {
                 if (elementHasAriaRole(cells->item(cellIndex)))
                     return false;
             }
         }
     }
 
     // If there is a caption element, summary, THEAD, or TFOOT section, it's most certainly a data table
     if (!tableElement->summary().isEmpty() || tableElement->tHead() || tableElement->tFoot() || tableElement->caption())
@@ skipping 414 matching lines @@
     }
 
     // try the standard
     if (title.isEmpty())
         title = AXRenderObject::title();
 
     return title;
 }
 
 } // namespace blink