Use new is*Element() helper functions in accessibility code

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 17 matching lines @@
 
 #include "config.h"
 #include "core/accessibility/AXTable.h"
 
 #include "core/accessibility/AXObjectCache.h"
 #include "core/accessibility/AXTableCell.h"
 #include "core/accessibility/AXTableColumn.h"
 #include "core/accessibility/AXTableRow.h"
 #include "core/html/HTMLTableCaptionElement.h"
 #include "core/html/HTMLTableCellElement.h"
+#include "core/html/HTMLTableColElement.h"
 #include "core/html/HTMLTableElement.h"
 #include "core/rendering/RenderTableCell.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 AXTable::AXTable(RenderObject* renderer)
     : AXRenderObject(renderer)
     , m_headerContainer(nullptr)
@@ skipping 64 matching lines @@
     // if there is a caption element, summary, THEAD, or TFOOT section, it's most certainly a data table
     HTMLTableElement* tableElement = toHTMLTableElement(tableNode);
     if (!tableElement->summary().isEmpty() || tableElement->tHead() || tableElement->tFoot() || tableElement->caption())
         return true;
 
     // if someone used "rules" attribute than the table should appear
     if (!tableElement->rules().isEmpty())
         return true;
 
     // if there's a colgroup or col element, it's probably a data table.
-    for (Node* child = tableElement->firstChild(); child; child = child->nextSibling()) {
-        if (child->hasTagName(colTag) || child->hasTagName(colgroupTag))
-            return true;
-    }
+    if (Traversal<HTMLTableColElement>::firstChild(*tableElement))
+        return true;
 
     // go through the cell's and check for tell-tale signs of "data" table status
     // cells have borders, or use attributes like headers, abbr, scope or axis
     table->recalcSectionsIfNeeded();
     RenderTableSection* firstBody = table->firstBody();
     if (!firstBody)
         return false;
 
     int numCols = firstBody->numColumns();
     int numRows = firstBody->numRows();
@@ skipping 48 matching lines @@
             bool isTHCell = cellNode->hasTagName(thTag);
             // If the first row is comprised of all <th> tags, assume it is a data table.
             if (!row && isTHCell)
                 headersInFirstRowCount++;
 
             // If the first column is comprised of all <th> tags, assume it is a data table.
             if (!col && isTHCell)
                 headersInFirstColumnCount++;
 
             // in this case, the developer explicitly assigned a "data" table attribute
-            if (cellNode->hasTagName(tdTag) || cellNode->hasTagName(thTag)) {
-                HTMLTableCellElement* cellElement = toHTMLTableCellElement(cellNode);
-                if (!cellElement->headers().isEmpty() || !cellElement->abbr().isEmpty()
-                    || !cellElement->axis().isEmpty() || !cellElement->scope().isEmpty())
+            if (isHTMLTableCellElement(*cellNode)) {
+                HTMLTableCellElement& cellElement = toHTMLTableCellElement(*cellNode);
+                if (!cellElement.headers().isEmpty() || !cellElement.abbr().isEmpty()
+                    || !cellElement.axis().isEmpty() || !cellElement.scope().isEmpty())
                     return true;
             }
 
             RenderStyle* renderStyle = cell->style();
             if (!renderStyle)
                 continue;
 
             // If the empty-cells style is set, we'll call it a data table.
             if (renderStyle->emptyCells() == HIDE)
                 return true;
@@ skipping 334 matching lines @@
     }
 
     // try the standard
     if (title.isEmpty())
         title = AXRenderObject::title();
 
     return title;
 }
 
 } // namespace WebCore