Fix blink_perf.paint regression about tables

third_party/WebKit/Source/modules/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 185 matching lines @@
   unsigned cellsWithBottomBorder = 0;
   unsigned cellsWithLeftBorder = 0;
   unsigned cellsWithRightBorder = 0;
 
   Color alternatingRowColors[5];
   int alternatingRowColorCount = 0;
 
   int headersInFirstColumnCount = 0;
   for (int row = 0; row < numRows; ++row) {
     int headersInFirstRowCount = 0;
-    for (int col = 0; col < numCols; ++col) {
+    int nCols = firstBody->numCols(row);

[mstensho (USE GERRIT), 2017/01/20 10:02:04]

Now there's both numCols and nCols, which is confusing. Maybe you should rename
the original numCols to numColsInFirstBody instead, and declare numCols here
instead.

[a.suchit, 2017/01/23 06:35:32]

Done.

+    for (int col = 0; col < nCols; ++col) {
       LayoutTableCell* cell = firstBody->primaryCellAt(row, col);
       if (!cell)
         continue;
       Node* cellNode = cell->node();
       if (!cellNode)
         continue;
 
       if (cell->size().width() < 1 || cell->size().height() < 1)
         continue;
 
@@ skipping 387 matching lines @@
 }
 
 DEFINE_TRACE(AXTable) {
   visitor->trace(m_rows);
   visitor->trace(m_columns);
   visitor->trace(m_headerContainer);
   AXLayoutObject::trace(visitor);
 }
 
 }  // namespace blink