Remove FIXME re: negative maxHeight.

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 45 matching lines @@
     , m_lineTop(0)
     , m_lineBottom(0)
     , m_lineTopWithLeading(0)
     , m_lineBottomWithLeading(0)
     , m_selectionBottom(0)
     , m_paginationStrut(0)
 {
     setIsHorizontal(block.isHorizontalWritingMode());
 }
 
-
 void RootInlineBox::destroy()
 {
     detachEllipsisBox();
     InlineFlowBox::destroy();
 }
 
 void RootInlineBox::detachEllipsisBox()
 {
     if (hasEllipsisBox()) {
         EllipsisBox* box = gEllipsisBoxMap->take(this);
@@ skipping 144 matching lines @@
     LayoutUnit lineTopIncludingMargins = heightOfBlock;
     LayoutUnit lineBottomIncludingMargins = heightOfBlock;
     LayoutUnit selectionBottom = heightOfBlock;
     bool setLineTop = false;
     bool hasAnnotationsBefore = false;
     bool hasAnnotationsAfter = false;
     placeBoxesInBlockDirection(heightOfBlock, maxHeight, maxAscent, noQuirksMode, lineTop, lineBottom, selectionBottom, setLineTop, lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType());
     m_hasAnnotationsBefore = hasAnnotationsBefore;
     m_hasAnnotationsAfter = hasAnnotationsAfter;
 
-    maxHeight = std::max<LayoutUnit>(0, maxHeight); // FIXME: Is this really necessary?
+    maxHeight = std::max<LayoutUnit>(0, maxHeight);
 
     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);
         heightOfBlock += annotationsAdjustment;
     }
@@ skipping 607 matching lines @@
     endBox = nullptr;
     return nullptr;
 }
 
 const char* RootInlineBox::boxName() const
 {
     return "RootInlineBox";
 }
 
 } // namespace blink