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

Source/core/rendering/shapes/ShapeInsideInfo.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 74 matching lines @@
     return m_segments.size();
 }
 
 bool ShapeInsideInfo::adjustLogicalLineTop(float minSegmentWidth)
 {
     const Shape* shape = computedShape();
     if (!shape || m_lineHeight <= 0 || logicalLineTop() > shapeLogicalBottom())
         return false;
 
     LayoutUnit newLineTop;
-    if (shape->firstIncludedIntervalLogicalTop(m_shapeLineTop, LayoutSize(minSegmentWidth, m_lineHeight), newLineTop)) {
+    if (shape->firstIncludedIntervalLogicalTop(m_shapeLineTop, FloatSize(minSegmentWidth, m_lineHeight), newLineTop)) {
         if (newLineTop > m_shapeLineTop) {
             m_shapeLineTop = newLineTop;
             return true;
         }
     }
 
     return false;
 }
 
 ShapeValue* ShapeInsideInfo::shapeValue() const
 {
     return m_renderer->style()->resolvedShapeInside();
 }
 
-LayoutUnit ShapeInsideInfo::computeFirstFitPositionForFloat(const LayoutSize floatSize) const
+LayoutUnit ShapeInsideInfo::computeFirstFitPositionForFloat(const FloatSize& floatSize) const
 {
     if (!computedShape() || !floatSize.width() || shapeLogicalBottom() < logicalLineTop())
         return 0;
 
     LayoutUnit firstFitPosition = 0;
     if (computedShape()->firstIncludedIntervalLogicalTop(m_shapeLineTop, floatSize, firstFitPosition) && (m_shapeLineTop <= firstFitPosition))
         return firstFitPosition;
 
     return 0;
 }
 
 }