[CSS Grid Layout] Fix auto-placement algorithm

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 163edcffe0754ba440f5c24fba58f1a10b62528a..fa4ff5e7865270123debe9559ba4b19f87303bbe 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -932,6 +932,10 @@ void RenderGrid::placeAutoMajorAxisItemOnGrid(RenderBox* gridItem)
                 const size_t endOfMinorAxis = autoPlacementMinorAxisDirection() == ForColumns ? gridColumnCount() : gridRowCount();
                 if (minorAxisFinalPositionIndex.toInt() < endOfMinorAxis)
                     break;
+
+                // Discard empty grid area as it does not fit in the minor axis direction.
+                // We don't need to create a new empty grid area yet as we might find a valid one in the next iteration.
+                emptyGridArea = nullptr;
             }
         }