Decouple root visitors from object visitors.

src/api-arguments.h

Index: src/api-arguments.h
diff --git a/src/api-arguments.h b/src/api-arguments.h
index 6c9ad7ad6b93f2f411eaad49e1280b67e499df2b..ca7b4833e9947e41b1e3e2009e699e4e88d2b823 100644
--- a/src/api-arguments.h
+++ b/src/api-arguments.h
@@ -7,6 +7,7 @@
 
 #include "src/api.h"
 #include "src/isolate.h"
+#include "src/visitors.h"
 
 namespace v8 {
 namespace internal {
@@ -17,8 +18,8 @@ namespace internal {
 template <int kArrayLength>
 class CustomArgumentsBase : public Relocatable {
  public:
-  virtual inline void IterateInstance(ObjectVisitor* v) {
-    v->VisitPointers(values_, values_ + kArrayLength);
+  virtual inline void IterateInstance(RootVisitor* v) {
+    v->VisitRootPointers(Root::kRelocatable, values_, values_ + kArrayLength);
   }
 
  protected: