[css-grid] Avoid double loop in positioned objects layout

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

 /*
  * 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 165 matching lines @@
   void computeTrackSizesForDefiniteSize(GridTrackSizingDirection,
                                         GridSizingData&,
                                         LayoutUnit freeSpace) const;
 
   void repeatTracksSizingIfNeeded(GridSizingData&,
                                   LayoutUnit availableSpaceForColumns,
                                   LayoutUnit availableSpaceForRows);
 
   void layoutGridItems(GridSizingData&);
   void prepareChildForPositionedLayout(LayoutBox&);
-  void layoutPositionedObjects(
+  void layoutPositionedObject(

[jfernandez, 2016/11/18 16:18:22]

Better keep overriding the layoutPositionedObjects function, as explained
before.

+      LayoutBox*,
       bool relayoutChildren,
       PositionedLayoutBehavior = DefaultLayout) override;
   void offsetAndBreadthForPositionedChild(const LayoutBox&,
                                           GridTrackSizingDirection,
                                           LayoutUnit& offset,
                                           LayoutUnit& breadth);
   void populateGridPositionsForDirection(GridSizingData&,
                                          GridTrackSizingDirection);
 
   typedef struct GridItemsSpanGroupRange GridItemsSpanGroupRange;
@@ skipping 175 matching lines @@
   std::unique_ptr<OrderedTrackIndexSet> m_autoRepeatEmptyRows{nullptr};
 
   Optional<bool> m_hasDefiniteLogicalHeight;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutGrid, isLayoutGrid());
 
 }  // namespace blink
 
 #endif  // LayoutGrid_h