Bind: Use VariadicTemplates in bind_internal.h

base/bind_unittest.nc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/callback.h"
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 
 namespace base {
 
@@ skipping 172 matching lines @@
 
 // WeakPtrs cannot be bound to methods with return types.
 void WontCompile() {
   NoRef no_ref;
   WeakPtrFactory<NoRef> weak_factory(&no_ref);
   Callback<int(void)> weak_ptr_with_non_void_return_type =
       Bind(&NoRef::IntMethod0, weak_factory.GetWeakPtr());
   weak_ptr_with_non_void_return_type.Run();
 }
 
-#elif defined(NCTEST_DISALLOW_ASSIGN_DIFFERENT_TYPES)  // [r"fatal error: no viable conversion from 'Callback<typename internal::BindState<typename internal::FunctorTraits<void \(\*\)\(int\)>::RunnableType, typename internal::FunctorTraits<void \(\*\)\(int\)>::RunType, void \(\)>::UnboundRunType>' to 'Callback<void \(\)>'"]
+#elif defined(NCTEST_DISALLOW_ASSIGN_DIFFERENT_TYPES)  // [r"fatal error: no viable conversion from 'Callback<typename internal::BindState<typename internal::FunctorTraits<void \(\*\)\(int\)>::RunnableType, typename internal::FunctorTraits<void \(\*\)\(int\)>::RunType, internal::TypeList<> >::UnboundRunType>' to 'Callback<void \(\)>'"]
 
 // Bind result cannot be assigned to Callbacks with a mismatching type.
 void WontCompile() {
   Closure callback_mismatches_bind_type = Bind(&VoidPolymorphic1<int>);
 }
 
 #endif
 
 }  // namespace base