Remove unnecessary LayoutUnit -> float -> LayoutUnit conversions.

Source/core/layout/line/RootInlineBox.cpp

 /*
  * Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 217 matching lines @@
     m_hasAnnotationsAfter = hasAnnotationsAfter;
 
     maxHeight = std::max<LayoutUnit>(0, maxHeight); // FIXME: Is this really necessary?
 
     setLineTopBottomPositions(lineTop, lineBottom, heightOfBlock, heightOfBlock + maxHeight, selectionBottom);
 
     LayoutUnit annotationsAdjustment = beforeAnnotationsAdjustment();
     if (annotationsAdjustment) {
         // FIXME: Need to handle pagination here. We might have to move to the next page/column as a result of the
         // ruby expansion.
-        moveInBlockDirection(annotationsAdjustment.toFloat());
+        moveInBlockDirection(annotationsAdjustment);
         heightOfBlock += annotationsAdjustment;
     }
 
     return heightOfBlock + maxHeight;
 }
 
 LayoutUnit RootInlineBox::maxLogicalTop() const
 {
     LayoutUnit maxLogicalTop;
     computeMaxLogicalTop(maxLogicalTop);
@@ skipping 599 matching lines @@
     endBox = nullptr;
     return nullptr;
 }
 
 const char* RootInlineBox::boxName() const
 {
     return "RootInlineBox";
 }
 
 } // namespace blink