Use Length for baselineShiftValue in SVGLayoutStyle

Source/core/layout/style/SVGLayoutStyleDefs.cpp

Index: Source/core/layout/style/SVGLayoutStyleDefs.cpp
diff --git a/Source/core/layout/style/SVGLayoutStyleDefs.cpp b/Source/core/layout/style/SVGLayoutStyleDefs.cpp
index 8a0bfc441b94bdacef65b62b3fdfd6cc364d2771..f680c446dd0ec694ab22ebb58fd0d14f290717a6 100644
--- a/Source/core/layout/style/SVGLayoutStyleDefs.cpp
+++ b/Source/core/layout/style/SVGLayoutStyleDefs.cpp
@@ -144,7 +144,7 @@ StyleMiscData::StyleMiscData(const StyleMiscData& other)
     , floodColor(other.floodColor)
     , floodOpacity(other.floodOpacity)
     , lightingColor(other.lightingColor)
-    , baselineShiftValue(other.baselineShiftValue->clone())
+    , baselineShiftValue(other.baselineShiftValue)
 {
 }
 
@@ -153,7 +153,7 @@ bool StyleMiscData::operator==(const StyleMiscData& other) const
     return floodOpacity == other.floodOpacity
         && floodColor == other.floodColor
         && lightingColor == other.lightingColor
-        && *baselineShiftValue == *other.baselineShiftValue;
+        && baselineShiftValue == other.baselineShiftValue;
 }
 
 StyleResourceData::StyleResourceData()