[CSS Shapes] First line gets incorrectly adjusted in shape-inside due to rounding

Source/core/rendering/shapes/PolygonShape.cpp

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. 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.
@@ skipping 425 matching lines @@
 
 static inline bool aboveOrToTheLeft(const FloatRect& r1, const FloatRect& r2)
 {
     if (r1.y() < r2.y())
         return true;
     if (r1.y() == r2.y())
         return r1.x() < r2.x();
     return false;
 }
 
-bool PolygonShape::firstIncludedIntervalLogicalTop(LayoutUnit minLogicalIntervalTop, const LayoutSize& minLogicalIntervalSize, LayoutUnit& result) const
+bool PolygonShape::firstIncludedIntervalLogicalTop(LayoutUnit minLogicalIntervalTop, const FloatSize& minLogicalIntervalSize, LayoutUnit& result) const
 {
     float minIntervalTop = minLogicalIntervalTop;
     float minIntervalHeight = minLogicalIntervalSize.height();
     float minIntervalWidth = minLogicalIntervalSize.width();
 
     const FloatPolygon& polygon = shapePaddingBounds();
     const FloatRect boundingBox = polygon.boundingBox();
     if (minIntervalWidth > boundingBox.width())
         return false;
 
@@ skipping 65 matching lines @@
             }
         }
     }
 
     if (firstFitFound)
         result = LayoutUnit::fromFloatCeil(firstFitRect.y());
     return firstFitFound;
 }
 
 } // namespace WebCore