Move GridCoordinate and GridSpan to a separate file

Source/core/rendering/RenderGrid.cpp

Index: Source/core/rendering/RenderGrid.cpp
diff --git a/Source/core/rendering/RenderGrid.cpp b/Source/core/rendering/RenderGrid.cpp
index 29f9c2cc9d1a95471008886f5133d690797ba967..cfbd888e7c2e97fff4cd56da3716ebb54c8e3216 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -29,6 +29,7 @@
 #include "core/rendering/LayoutRepainter.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
+#include "core/rendering/style/GridCoordinate.h"
 
 namespace WebCore {
 
@@ -808,20 +809,20 @@ void RenderGrid::layoutGridItems()
     clearGrid();
 }
 
-RenderGrid::GridCoordinate RenderGrid::cachedGridCoordinate(const RenderBox* gridItem) const
+GridCoordinate RenderGrid::cachedGridCoordinate(const RenderBox* gridItem) const
 {
     ASSERT(m_gridItemCoordinate.contains(gridItem));
     return m_gridItemCoordinate.get(gridItem);
 }
 
-RenderGrid::GridSpan RenderGrid::resolveGridPositionsFromAutoPlacementPosition(const RenderBox*, TrackSizingDirection, size_t initialPosition) const
+GridSpan RenderGrid::resolveGridPositionsFromAutoPlacementPosition(const RenderBox*, TrackSizingDirection, size_t initialPosition) const
 {
     // FIXME: We don't support spanning with auto positions yet. Once we do, this is wrong. Also we should make
     // sure the grid can accomodate the new item as we only grow 1 position in a given direction.
     return GridSpan(initialPosition, initialPosition);
 }
 
-PassOwnPtr<RenderGrid::GridSpan> RenderGrid::resolveGridPositionsFromStyle(const RenderBox* gridItem, TrackSizingDirection direction) const
+PassOwnPtr<GridSpan> RenderGrid::resolveGridPositionsFromStyle(const RenderBox* gridItem, TrackSizingDirection direction) const
 {
     const GridPosition& initialPosition = (direction == ForColumns) ? gridItem->style()->gridColumnStart() : gridItem->style()->gridRowStart();
     const GridPositionSide initialPositionSide = (direction == ForColumns) ? ColumnStartSide : RowStartSide;
@@ -927,7 +928,7 @@ size_t RenderGrid::resolveGridPositionFromStyle(const GridPosition& position, Gr
     return 0;
 }
 
-PassOwnPtr<RenderGrid::GridSpan> RenderGrid::resolveGridPositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, GridPositionSide side) const
+PassOwnPtr<GridSpan> RenderGrid::resolveGridPositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, GridPositionSide side) const
 {
     if (position.isAuto())
         return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition);