remove old MakeWeak

src/debug.h

Index: src/debug.h
diff --git a/src/debug.h b/src/debug.h
index ccdc0c05e619dc3231c30e541a11e1a81370ac69..467acb93e81eb130372a36eb2c4a873e00302a96 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -190,7 +190,7 @@ class ScriptCache : private HashMap {
 
   // Weak handle callback for scripts in the cache.
   static void HandleWeakScript(v8::Isolate* isolate,
-                               v8::Persistent<v8::Value> obj,
+                               v8::Persistent<v8::Value>* obj,
                                void* data);
 
   // List used during GC to temporarily store id's of collected scripts.
@@ -387,7 +387,7 @@ class Debug {
 
   // Passed to MakeWeak.
   static void HandleWeakDebugInfo(v8::Isolate* isolate,
-                                  v8::Persistent<v8::Value> obj,
+                                  v8::Persistent<v8::Value>* obj,
                                   void* data);
 
   friend class Debugger;