Deleted OS_WIN and all Windows specific files from base.

base/bind_internal_win.h

-// 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.
-
-// Specializations of RunnableAdapter<> for Windows specific calling
-// conventions.  Please see base/bind_internal.h for more info.
-
-#ifndef BASE_BIND_INTERNAL_WIN_H_
-#define BASE_BIND_INTERNAL_WIN_H_
-
-// In the x64 architecture in Windows, __fastcall, __stdcall, etc, are all
-// the same as __cdecl which would turn the following specializations into
-// multiple definitions.
-#if !defined(ARCH_CPU_X86_64)
-
-namespace base {
-namespace internal {
-
-template <typename Functor>
-class RunnableAdapter;
-
-// __stdcall Function.
-template <typename R, typename... Args>
-class RunnableAdapter<R(__stdcall *)(Args...)> {
- public:
-  typedef R (RunType)(Args...);
-
-  explicit RunnableAdapter(R(__stdcall *function)(Args...))
-      : function_(function) {
-  }
-
-  R Run(typename CallbackParamTraits<Args>::ForwardType... args) {
-    return function_(args...);
-  }
-
- private:
-  R (__stdcall *function_)(Args...);
-};
-
-// __fastcall Function.
-template <typename R, typename... Args>
-class RunnableAdapter<R(__fastcall *)(Args...)> {
- public:
-  typedef R (RunType)(Args...);
-
-  explicit RunnableAdapter(R(__fastcall *function)(Args...))
-      : function_(function) {
-  }
-
-  R Run(typename CallbackParamTraits<Args>::ForwardType... args) {
-    return function_(args...);
-  }
-
- private:
-  R (__fastcall *function_)(Args...);
-};
-
-}  // namespace internal
-}  // namespace base
-
-#endif  // !defined(ARCH_CPU_X86_64)
-
-#endif  // BASE_BIND_INTERNAL_WIN_H_