InlinedVisitor: Migrate xml to use inlined tracing

Source/core/xml/XPathPath.cpp

Index: Source/core/xml/XPathPath.cpp
diff --git a/Source/core/xml/XPathPath.cpp b/Source/core/xml/XPathPath.cpp
index 74dc33cb7b92b653468ba3ccffc04d29c976a4c9..e992e853494c98acf7fc4578230632f9d37b7a10 100644
--- a/Source/core/xml/XPathPath.cpp
+++ b/Source/core/xml/XPathPath.cpp
@@ -50,7 +50,7 @@ Filter::~Filter()
 {
 }
 
-void Filter::trace(Visitor* visitor)
+DEFINE_TRACE(Filter)
 {
     visitor->trace(m_expr);
     visitor->trace(m_predicates);
@@ -97,7 +97,7 @@ LocationPath::~LocationPath()
 #endif
 }
 
-void LocationPath::trace(Visitor* visitor)
+DEFINE_TRACE(LocationPath)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_steps);
@@ -217,7 +217,7 @@ Path::~Path()
 {
 }
 
-void Path::trace(Visitor* visitor)
+DEFINE_TRACE(Path)
 {
     visitor->trace(m_filter);
     visitor->trace(m_path);