Allow fractional letter- word-spacing values.

Source/core/page/animation/CSSPropertyAnimation.cpp

Index: Source/core/page/animation/CSSPropertyAnimation.cpp
diff --git a/Source/core/page/animation/CSSPropertyAnimation.cpp b/Source/core/page/animation/CSSPropertyAnimation.cpp
index 06022ab450b1c88a4ef3cbdee2b2b4e48f760ea1..a32007edb6d859dc071c09a7f502eb330b3e08dd 100644
--- a/Source/core/page/animation/CSSPropertyAnimation.cpp
+++ b/Source/core/page/animation/CSSPropertyAnimation.cpp
@@ -1108,8 +1108,8 @@ void CSSPropertyAnimation::ensurePropertyMap()
     gPropertyWrappers->append(new PropertyWrapper<Length>(CSSPropertyLineHeight, &RenderStyle::specifiedLineHeight, &RenderStyle::setLineHeight));
     gPropertyWrappers->append(new PropertyWrapper<int>(CSSPropertyOutlineOffset, &RenderStyle::outlineOffset, &RenderStyle::setOutlineOffset));
     gPropertyWrappers->append(new PropertyWrapper<unsigned short>(CSSPropertyOutlineWidth, &RenderStyle::outlineWidth, &RenderStyle::setOutlineWidth));
-    gPropertyWrappers->append(new PropertyWrapper<int>(CSSPropertyLetterSpacing, &RenderStyle::letterSpacing, &RenderStyle::setLetterSpacing));
-    gPropertyWrappers->append(new PropertyWrapper<int>(CSSPropertyWordSpacing, &RenderStyle::wordSpacing, &RenderStyle::setWordSpacing));
+    gPropertyWrappers->append(new PropertyWrapper<float>(CSSPropertyLetterSpacing, &RenderStyle::letterSpacing, &RenderStyle::setLetterSpacing));
+    gPropertyWrappers->append(new PropertyWrapper<float>(CSSPropertyWordSpacing, &RenderStyle::wordSpacing, &RenderStyle::setWordSpacing));
     gPropertyWrappers->append(new PropertyWrapper<Length>(CSSPropertyTextIndent, &RenderStyle::textIndent, &RenderStyle::setTextIndent));
 
     gPropertyWrappers->append(new PropertyWrapper<float>(CSSPropertyWebkitPerspective, &RenderStyle::perspective, &RenderStyle::setPerspective));