Allow fractional letter- word-spacing values.

Source/core/platform/graphics/Font.cpp

Index: Source/core/platform/graphics/Font.cpp
diff --git a/Source/core/platform/graphics/Font.cpp b/Source/core/platform/graphics/Font.cpp
index 4d610de1a0b08d8fd66710d57ead6e32a703636b..f948c7e8c9de9c02fc4e0ea40e31a48f61e23e9a 100644
--- a/Source/core/platform/graphics/Font.cpp
+++ b/Source/core/platform/graphics/Font.cpp
@@ -76,7 +76,7 @@ Font::Font()
 {
 }
 
-Font::Font(const FontDescription& fd, short letterSpacing, short wordSpacing) 
+Font::Font(const FontDescription& fd, float letterSpacing, float wordSpacing)
     : m_fontDescription(fd)
     , m_letterSpacing(letterSpacing)
     , m_wordSpacing(wordSpacing)
@@ -201,7 +201,7 @@ float Font::width(const TextRun& run, HashSet<const SimpleFontData*>* fallbackFo
     }
 
     bool hasKerningOrLigatures = typesettingFeatures() & (Kerning | Ligatures);
-    bool hasWordSpacingOrLetterSpacing = wordSpacing() | letterSpacing();
+    bool hasWordSpacingOrLetterSpacing = wordSpacing() || letterSpacing();
     float* cacheEntry = m_fontFallbackList->widthCache().add(run, std::numeric_limits<float>::quiet_NaN(), hasKerningOrLigatures, hasWordSpacingOrLetterSpacing, glyphOverflow);
     if (cacheEntry && !std::isnan(*cacheEntry))
         return *cacheEntry;