CSSValue Immediates: Replace CSSPrimitiveValue usage with const references

Source/core/css/BasicShapeFunctions.cpp

Index: Source/core/css/BasicShapeFunctions.cpp
diff --git a/Source/core/css/BasicShapeFunctions.cpp b/Source/core/css/BasicShapeFunctions.cpp
index 5eb0551bca491aae11e08e580c8b8fe7ec4a278a..e28bbba7c559cdf7a4f1193076685349d9218727 100644
--- a/Source/core/css/BasicShapeFunctions.cpp
+++ b/Source/core/css/BasicShapeFunctions.cpp
@@ -129,14 +129,14 @@ CSSValue valueForBasicShape(const ComputedStyle& style, const BasicShape* basicS
     return pool.createValue(basicShapeValue.release());
 }
 
-static Length convertToLength(const StyleResolverState& state, NullableCSSValue value)
+static Length convertToLength(const StyleResolverState& state, const NullableCSSValue& value)
 {
     if (!value)
         return Length(0, Fixed);
     return toCSSPrimitiveValue(*value).convertToLength(state.cssToLengthConversionData());
 }
 
-static LengthSize convertToLengthSize(const StyleResolverState& state, NullableCSSValue value)
+static LengthSize convertToLengthSize(const StyleResolverState& state, const NullableCSSValue& value)
 {
     if (!value)
         return LengthSize(Length(0, Fixed), Length(0, Fixed));
@@ -145,7 +145,7 @@ static LengthSize convertToLengthSize(const StyleResolverState& state, NullableC
     return LengthSize(convertToLength(state, pair->first()), convertToLength(state, pair->second()));
 }
 
-static BasicShapeCenterCoordinate convertToCenterCoordinate(const StyleResolverState& state, NullableCSSValue value)
+static BasicShapeCenterCoordinate convertToCenterCoordinate(const StyleResolverState& state, const NullableCSSValue& value)
 {
     BasicShapeCenterCoordinate::Direction direction;
     Length offset = Length(0, Fixed);
@@ -156,7 +156,7 @@ static BasicShapeCenterCoordinate convertToCenterCoordinate(const StyleResolverS
     } else if (toCSSPrimitiveValue(*value).isValueID()) {
         keyword = toCSSPrimitiveValue(*value).getValueID();
     } else if (Pair* pair = toCSSPrimitiveValue(*value).getPairValue()) {
-        keyword = toCSSPrimitiveValue(*pair->first()).getValueID();
+        keyword = pair->first().getValueID();
         offset = convertToLength(state, pair->second());
     } else {
         offset = convertToLength(state, value);
@@ -184,7 +184,7 @@ static BasicShapeCenterCoordinate convertToCenterCoordinate(const StyleResolverS
     return BasicShapeCenterCoordinate(direction, offset);
 }
 
-static BasicShapeRadius cssValueToBasicShapeRadius(const StyleResolverState& state, NullableCSSValue radius)
+static BasicShapeRadius cssValueToBasicShapeRadius(const StyleResolverState& state, const NullableCSSValue& radius)
 {
     if (!radius)
         return BasicShapeRadius(BasicShapeRadius::ClosestSide);