Deleted OS_WIN and all Windows specific files from base.

base/process/process_handle_win.cc

-// Copyright (c) 2013 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/process/process_handle.h"
-
-#include <windows.h>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/win/scoped_handle.h"
-#include "base/win/windows_version.h"
-
-namespace base {
-
-ProcessId GetCurrentProcId() {
-  return ::GetCurrentProcessId();
-}
-
-ProcessHandle GetCurrentProcessHandle() {
-  return ::GetCurrentProcess();
-}
-
-ProcessId GetProcId(ProcessHandle process) {
-  // This returns 0 if we have insufficient rights to query the process handle.
-  return GetProcessId(process);
-}
-
-}  // namespace base