InlinedVisitor: Migrate css to use inlined tracing

Source/core/css/CSSGradientValue.cpp

Index: Source/core/css/CSSGradientValue.cpp
diff --git a/Source/core/css/CSSGradientValue.cpp b/Source/core/css/CSSGradientValue.cpp
index 1f86b09498bbbc041709eaa367bd74a8273ea197..0fcf71064b214e11037b9cba4be0dfcbbcfa6314 100644
--- a/Source/core/css/CSSGradientValue.cpp
+++ b/Source/core/css/CSSGradientValue.cpp
@@ -43,7 +43,7 @@
 
 namespace blink {
 
-void CSSGradientColorStop::trace(Visitor* visitor)
+DEFINE_TRACE(CSSGradientColorStop)
 {
     visitor->trace(m_position);
     visitor->trace(m_color);
@@ -556,7 +556,7 @@ bool CSSGradientValue::knownToBeOpaque(const LayoutObject* object) const
     return true;
 }
 
-void CSSGradientValue::traceAfterDispatch(Visitor* visitor)
+DEFINE_TRACE_AFTER_DISPATCH(CSSGradientValue)
 {
     visitor->trace(m_firstX);
     visitor->trace(m_firstY);
@@ -821,7 +821,7 @@ bool CSSLinearGradientValue::equals(const CSSLinearGradientValue& other) const
     return equalXandY && m_stops == other.m_stops;
 }
 
-void CSSLinearGradientValue::traceAfterDispatch(Visitor* visitor)
+DEFINE_TRACE_AFTER_DISPATCH(CSSLinearGradientValue)
 {
     visitor->trace(m_angle);
     CSSGradientValue::traceAfterDispatch(visitor);
@@ -1259,7 +1259,7 @@ bool CSSRadialGradientValue::equals(const CSSRadialGradientValue& other) const
     return equalShape && equalSizingBehavior && equalHorizontalAndVerticalSize && m_stops == other.m_stops;
 }
 
-void CSSRadialGradientValue::traceAfterDispatch(Visitor* visitor)
+DEFINE_TRACE_AFTER_DISPATCH(CSSRadialGradientValue)
 {
     visitor->trace(m_firstRadius);
     visitor->trace(m_secondRadius);