Callback: De-inline CallbackBase, and move to callback_helpers -> callback_internal.h

base/bind_internal.h.pump

 $$ This is a pump file for generating file templates.  Pump is a python
 $$ script that is part of the Google Test suite of utilities.  Description
 $$ can be found here:
 $$
 $$ http://code.google.com/p/googletest/wiki/PumpManual
 $$
 
 $var MAX_ARITY = 6
 
 // 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.
 
 #ifndef BASE_BIND_INTERNAL_H_
 #define BASE_BIND_INTERNAL_H_
 #pragma once
 
 #include "base/bind_helpers.h"
-#include "base/callback_helpers.h"
+#include "base/callback_internal.h"
 #include "base/template_util.h"
 
 namespace base {
 namespace internal {
 
 // The method by which a function is invoked is determined by 3 different
 // dimensions:
 //
 //   1) The type of function (normal, method, const-method)
 //   2) The arity of the function
@@ skipping 198 matching lines @@
 
 ]]
 };
 
 ]]  $$ for BOUND
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_BIND_INTERNAL_H_