Allow fractional letter- word-spacing values.

Source/core/rendering/style/RenderStyle.cpp

Index: Source/core/rendering/style/RenderStyle.cpp
diff --git a/Source/core/rendering/style/RenderStyle.cpp b/Source/core/rendering/style/RenderStyle.cpp
index f8a4e32c62029cb31c1f7906a8b0994bc48139a8..a48257fdfa04ec7ca1520c628dd7a1e98e6c0649 100644
--- a/Source/core/rendering/style/RenderStyle.cpp
+++ b/Source/core/rendering/style/RenderStyle.cpp
@@ -1153,8 +1153,8 @@ float RenderStyle::specifiedFontSize() const { return fontDescription().specifie
 float RenderStyle::computedFontSize() const { return fontDescription().computedSize(); }
 int RenderStyle::fontSize() const { return inherited->font.pixelSize(); }
 
-int RenderStyle::wordSpacing() const { return inherited->font.wordSpacing(); }
-int RenderStyle::letterSpacing() const { return inherited->font.letterSpacing(); }
+float RenderStyle::wordSpacing() const { return inherited->font.wordSpacing(); }
+float RenderStyle::letterSpacing() const { return inherited->font.letterSpacing(); }
 
 bool RenderStyle::setFontDescription(const FontDescription& v)
 {
@@ -1198,8 +1198,8 @@ int RenderStyle::computedLineHeight(RenderView* renderView) const
     return lh.value();
 }
 
-void RenderStyle::setWordSpacing(int v) { inherited.access()->font.setWordSpacing(v); }
-void RenderStyle::setLetterSpacing(int v) { inherited.access()->font.setLetterSpacing(v); }
+void RenderStyle::setWordSpacing(float v) { inherited.access()->font.setWordSpacing(v); }
+void RenderStyle::setLetterSpacing(float v) { inherited.access()->font.setLetterSpacing(v); }
 
 void RenderStyle::setFontSize(float size)
 {