[css-grid] Use grid-template-areas to determine the explicit grid

third_party/WebKit/Source/core/layout/LayoutGrid.cpp

 /*
  * Copyright (C) 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 290 matching lines @@
 
     if (explicitGridDidResize(*oldStyle)
         || namedGridLinesDefinitionDidChange(*oldStyle)
         || oldStyle->getGridAutoFlow() != styleRef().getGridAutoFlow())
         dirtyGrid();
 }
 
 bool LayoutGrid::explicitGridDidResize(const ComputedStyle& oldStyle) const
 {
     return oldStyle.gridTemplateColumns().size() != styleRef().gridTemplateColumns().size()
-        || oldStyle.gridTemplateRows().size() != styleRef().gridTemplateRows().size();
+        || oldStyle.gridTemplateRows().size() != styleRef().gridTemplateRows().size()
+        || oldStyle.namedGridAreaColumnCount() != styleRef().namedGridAreaColumnCount()
+        || oldStyle.namedGridAreaRowCount() != styleRef().namedGridAreaRowCount();
 }
 
 bool LayoutGrid::namedGridLinesDefinitionDidChange(const ComputedStyle& oldStyle) const
 {
     return oldStyle.namedGridRowLines() != styleRef().namedGridRowLines()
         || oldStyle.namedGridColumnLines() != styleRef().namedGridColumnLines();
 }
 
 LayoutUnit LayoutGrid::computeTrackBasedLogicalHeight(const GridSizingData& sizingData) const
 {
@@ skipping 1816 matching lines @@
 
     return LayoutPoint(rowAxisOffset, columnAxisOffsetForChild(child, sizingData));
 }
 
 void LayoutGrid::paintChildren(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
 {
     GridPainter(*this).paintChildren(paintInfo, paintOffset);
 }
 
 } // namespace blink