Change LineWidth::snapUncommittedWidth to ceil

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

 /*
  * 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 53 matching lines @@
     float availableWidth() const { return m_availableWidth; }
     float trailingWhitespaceWidth() const { return m_trailingWhitespaceWidth; }
 
     void updateAvailableWidth(LayoutUnit minimumHeight = LayoutUnit());
     void shrinkAvailableWidthForNewFloatIfNeeded(const FloatingObject&);
     void addUncommittedWidth(float delta) { m_uncommittedWidth += delta; }
     void commit();
     void applyOverhang(LineLayoutRubyRun, LineLayoutItem startLayoutItem, LineLayoutItem endLayoutItem);
     void fitBelowFloats(bool isFirstLine = false);
     void setTrailingWhitespaceWidth(float width) { m_trailingWhitespaceWidth = width; }
-    void snapUncommittedWidth() { m_uncommittedWidth = LayoutUnit(m_uncommittedWidth).toFloat(); }
+    void snapUncommittedWidth() { m_uncommittedWidth = LayoutUnit::fromFloatCeil(m_uncommittedWidth).toFloat(); }
 
     IndentTextOrNot indentText() const { return m_indentText; }
 
 private:
     void computeAvailableWidthFromLeftAndRight();
     void updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, const float& newLineLeft, const float& newLineRight);
     void wrapNextToShapeOutside(bool isFirstLine);
 
     LineLayoutBlockFlow m_block;
     float m_uncommittedWidth;
     float m_committedWidth;
     float m_overhangWidth; // The amount by which |m_availableWidth| has been inflated to account for possible contraction due to ruby overhang.
     float m_trailingWhitespaceWidth;
     float m_left;
     float m_right;
     float m_availableWidth;
     bool m_isFirstLine;
     IndentTextOrNot m_indentText;
 };
 
 } // namespace blink
 
 #endif // LineWidth_h