Restore epsilon tolerance in LineWidth

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 30 matching lines @@
 
 enum WhitespaceTreatment { ExcludeWhitespace, IncludeWhitespace };
 
 class LineWidth {
     STACK_ALLOCATED();
 public:
     LineWidth(LineLayoutBlockFlow, bool isFirstLine, IndentTextOrNot);
 
     bool fitsOnLine() const
     {
-        return LayoutUnit::fromFloatFloor(currentWidth()) <= m_availableWidth;
+        return LayoutUnit::fromFloatFloor(currentWidth()) <= m_availableWidth + LayoutUnit::epsilon();
     }
     bool fitsOnLine(float extra) const
     {
         float totalWidth = currentWidth() + extra;
-        return LayoutUnit::fromFloatFloor(totalWidth) <= m_availableWidth;
+        return LayoutUnit::fromFloatFloor(totalWidth) <= m_availableWidth + LayoutUnit::epsilon();
     }
     bool fitsOnLine(float extra, WhitespaceTreatment whitespaceTreatment) const
     {
         LayoutUnit w = LayoutUnit::fromFloatFloor(currentWidth() + extra);
         if (whitespaceTreatment == ExcludeWhitespace)
             w -= LayoutUnit::fromFloatCeil(trailingWhitespaceWidth());
         return w <= m_availableWidth;
     }
 
     // Note that m_uncommittedWidth may not be LayoutUnit-snapped at this point.  Because
@@ skipping 31 matching lines @@
     LayoutUnit m_left;
     LayoutUnit m_right;
     LayoutUnit m_availableWidth;
     bool m_isFirstLine;
     IndentTextOrNot m_indentText;
 };
 
 } // namespace blink
 
 #endif // LineWidth_h