More explicit LayoutUnit conversions

third_party/WebKit/Source/core/layout/line/LineWidth.cpp

 /*
  * Copyright (C) 2013 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 101 matching lines @@
 
     startOverhang = std::min<int>(startOverhang, m_committedWidth);
     m_availableWidth += startOverhang;
 
     endOverhang = std::max(std::min<int>(endOverhang, m_availableWidth - currentWidth()), 0);
     m_availableWidth += endOverhang;
     m_overhangWidth += startOverhang + endOverhang;
 }
 
 inline static float availableWidthAtOffset(LineLayoutBlockFlow block, const LayoutUnit& offset, IndentTextOrNot indentText, float& newLineLeft,
-    float& newLineRight, const LayoutUnit& lineHeight = 0)
+    float& newLineRight, const LayoutUnit& lineHeight = LayoutUnit())
 {
     newLineLeft = block.logicalLeftOffsetForLine(offset, indentText, lineHeight).toFloat();
     newLineRight = block.logicalRightOffsetForLine(offset, indentText, lineHeight).toFloat();
     return std::max(0.0f, newLineRight - newLineLeft);
 }
 
 void LineWidth::updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, const float& newLineLeft, const float& newLineRight)
 {
     if (newLineWidth <= m_availableWidth)
         return;
@@ skipping 56 matching lines @@
     }
     updateLineDimension(lastFloatLogicalBottom, newLineWidth, newLineLeft, newLineRight);
 }
 
 void LineWidth::computeAvailableWidthFromLeftAndRight()
 {
     m_availableWidth = max(0.0f, m_right - m_left) + m_overhangWidth;
 }
 
 } // namespace blink