Change LineWidth::fitsOnLine comparison logic

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 28 matching lines @@
 class FloatingObject;
 class LineLayoutRubyRun;
 
 enum WhitespaceTreatment { ExcludeWhitespace, IncludeWhitespace };
 
 class LineWidth {
     STACK_ALLOCATED();
 public:
     LineWidth(LineLayoutBlockFlow, bool isFirstLine, IndentTextOrNot);
 
-    bool fitsOnLine() const { return currentWidth() <= (m_availableWidth + LayoutUnit::epsilon()); }
-    bool fitsOnLine(float extra) const { return currentWidth() + extra <= (m_availableWidth + LayoutUnit::epsilon()); }
+    bool fitsOnLine() const
+    {
+        return LayoutUnit::fromFloatFloor(currentWidth()) <= m_availableWidth;
+    }
+    bool fitsOnLine(float extra) const
+    {
+        float totalWidth = currentWidth() + extra;
+        return LayoutUnit::fromFloatFloor(totalWidth) <= m_availableWidth;
+    }
     bool fitsOnLine(float extra, WhitespaceTreatment whitespaceTreatment) const
     {
         return currentWidth() - (whitespaceTreatment == ExcludeWhitespace ? trailingWhitespaceWidth() : 0) + extra <= (m_availableWidth + LayoutUnit::epsilon());
     }
 
     // Note that m_uncommittedWidth may not be LayoutUnit-snapped at this point.  Because
     // currentWidth() is used by the code that lays out words in a single LayoutText, it's
     // expected that offsets will not be snapped until an InlineBox boundary is reached.
     float currentWidth() const { return m_committedWidth + m_uncommittedWidth; }
 
@@ skipping 27 matching lines @@
     float m_left;
     float m_right;
     float m_availableWidth;
     bool m_isFirstLine;
     IndentTextOrNot m_indentText;
 };
 
 } // namespace blink
 
 #endif // LineWidth_h