Revert 154885 - Extend base::Callback to 8 arguments.

base/bind_internal_win.h

Index: base/bind_internal_win.h
===================================================================
--- base/bind_internal_win.h	(revision 154900)
+++ base/bind_internal_win.h	(working copy)
@@ -360,33 +360,6 @@
   R (__fastcall *function_)(A1, A2, A3, A4, A5, A6, A7);
 };
 
-// __fastcall Function: Arity 8.
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8>
-class RunnableAdapter<R(__fastcall *)(A1, A2, A3, A4, A5, A6, A7, A8)> {
- public:
-  typedef R (RunType)(A1, A2, A3, A4, A5, A6, A7, A8);
-
-  explicit RunnableAdapter(R(__fastcall *function)(A1, A2, A3, A4, A5, A6, A7,
-                                                   A8))
-      : function_(function) {
-  }
-
-  R Run(typename CallbackParamTraits<A1>::ForwardType a1,
-      typename CallbackParamTraits<A2>::ForwardType a2,
-      typename CallbackParamTraits<A3>::ForwardType a3,
-      typename CallbackParamTraits<A4>::ForwardType a4,
-      typename CallbackParamTraits<A5>::ForwardType a5,
-      typename CallbackParamTraits<A6>::ForwardType a6,
-      typename CallbackParamTraits<A7>::ForwardType a7,
-      typename CallbackParamTraits<A8>::ForwardType a8) {
-    return function_(a1, a2, a3, a4, a5, a6, a7, a8);
-  }
-
- private:
-  R (__fastcall *function_)(A1, A2, A3, A4, A5, A6, A7, A8);
-};
-
 }  // namespace internal
 }  // namespace base