Remove CallbackParamTraits and CallbackForward

base/callback_list.h

Index: base/callback_list.h
diff --git a/base/callback_list.h b/base/callback_list.h
index 7d6a478e8ce067338dfae8917a5cde7440cf9dae..20938334f8f1a74ae5f9ca45a4e51fb1f39d92cc 100644
--- a/base/callback_list.h
+++ b/base/callback_list.h
@@ -8,7 +8,6 @@
 #include <list>
 
 #include "base/callback.h"
-#include "base/callback_internal.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ -211,8 +210,8 @@ class CallbackList<void(Args...)>
 
   CallbackList() {}
 
-  void Notify(
-      typename internal::CallbackParamTraits<Args>::ForwardType... args) {
+  template <typename... RunArgs>
+  void Notify(RunArgs&&... args) {
     typename internal::CallbackListBase<CallbackType>::Iterator it =
         this->GetIterator();
     CallbackType* cb;