[css-grid] Use firstInFlowChildBox API for iterate over the grid items

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 474 matching lines @@
     // information (which may trigger relayout).
     LayoutState state(*this, locationOffset());
 
     LayoutSize previousSize = size();
 
     // We need to clear both own and containingBlock override sizes to
     // ensure we get the same result when grid's intrinsic size is
     // computed again in the updateLogicalWidth call bellow.
     if (sizesLogicalWidthToFitContent(styleRef().logicalWidth()) ||
         styleRef().logicalWidth().isIntrinsicOrAuto()) {
-      for (auto* child = firstChildBox(); child;
+      for (auto* child = firstInFlowChildBox(); child;
            child = child->nextInFlowSiblingBox()) {
-        if (child->isOutOfFlowPositioned() || !isOrthogonalChild(*child))
+        if (!isOrthogonalChild(*child))
           continue;
         child->clearOverrideSize();
         child->clearContainingBlockOverrideSize();
         child->forceLayout();
       }
     }
 
     updateLogicalWidth();
     m_hasDefiniteLogicalHeight = hasDefiniteLogicalHeight();
 
@@ skipping 1480 matching lines @@
 
   m_smallestRowStart = m_smallestColumnStart = 0;
 
   size_t maximumRowIndex =
       GridPositionsResolver::explicitGridRowCount(*style(), m_autoRepeatRows);
   size_t maximumColumnIndex = GridPositionsResolver::explicitGridColumnCount(
       *style(), m_autoRepeatColumns);
 
   ASSERT(m_gridItemsIndexesMap.isEmpty());
   size_t childIndex = 0;
-  for (LayoutBox* child = firstChildBox(); child;
+  for (LayoutBox* child = firstInFlowChildBox(); child;
        child = child->nextInFlowSiblingBox()) {
-    if (child->isOutOfFlowPositioned())
-      continue;
-
     populator.collectChild(child);
     m_gridItemsIndexesMap.set(child, childIndex++);
 
     // This function bypasses the cache (cachedGridArea()) as it is used to
     // build it.
     GridSpan rowPositions =
         GridPositionsResolver::resolveGridPositionsFromStyle(
             *style(), *child, ForRows, m_autoRepeatRows);
     GridSpan columnPositions =
         GridPositionsResolver::resolveGridPositionsFromStyle(
@@ skipping 1309 matching lines @@
   if (!m_gridItemArea.isEmpty())
     GridPainter(*this).paintChildren(paintInfo, paintOffset);
 }
 
 bool LayoutGrid::cachedHasDefiniteLogicalHeight() const {
   SECURITY_DCHECK(m_hasDefiniteLogicalHeight);
   return m_hasDefiniteLogicalHeight.value();
 }
 
 }  // namespace blink