Port CallSite methods to C++.

src/runtime/runtime-debug.cc

Index: src/runtime/runtime-debug.cc
diff --git a/src/runtime/runtime-debug.cc b/src/runtime/runtime-debug.cc
index d23d0e2322e983aa019cfa3364937df4cd52d324..239f2b2e38f36ab7b30a111ce223a5f362525cb7 100644
--- a/src/runtime/runtime-debug.cc
+++ b/src/runtime/runtime-debug.cc
@@ -2770,15 +2770,6 @@ RUNTIME_FUNCTION(Runtime_FunctionGetInferredName) {
 }
 
 
-RUNTIME_FUNCTION(Runtime_FunctionGetDebugName) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
-
-  CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0);
-  return *JSFunction::GetDebugName(f);
-}
-
-
 // A testing entry. Returns statement position which is the closest to
 // source_position.
 RUNTIME_FUNCTION(Runtime_GetFunctionCodePositionFromSource) {