[css-grid] Fix static position of positioned 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 2583 matching lines @@
     if (!gridAreaRect.contains(child->frameRect()))
       m_gridItemsOverflowingGridArea.push_back(child);
   }
 }
 
 void LayoutGrid::prepareChildForPositionedLayout(LayoutBox& child) {
   ASSERT(child.isOutOfFlowPositioned());
   child.containingBlock()->insertPositionedObject(&child);
 
   PaintLayer* childLayer = child.layer();
-  childLayer->setStaticInlinePosition(borderAndPaddingStart());
-  childLayer->setStaticBlockPosition(borderAndPaddingBefore());
+  childLayer->setStaticInlinePosition(LayoutUnit(borderStart()));
+  childLayer->setStaticBlockPosition(LayoutUnit(borderBefore()));
 }
 
 void LayoutGrid::layoutPositionedObjects(bool relayoutChildren,
                                          PositionedLayoutBehavior info) {
   TrackedLayoutBoxListHashSet* positionedDescendants = positionedObjects();
   if (!positionedDescendants)
     return;
 
   for (auto* child : *positionedDescendants) {
     if (isOrthogonalChild(*child)) {
@@ skipping 1012 matching lines @@
   if (direction == ForRows)
     return grid.numTracks(ForRows);
 
   return grid.numTracks(ForRows)
              ? grid.numTracks(ForColumns)
              : GridPositionsResolver::explicitGridColumnCount(
                    styleRef(), grid.autoRepeatTracks(ForColumns));
 }
 
 }  // namespace blink