Deleted OS_WIN and all Windows specific files from base.

base/synchronization/lock_impl_win.cc

-// 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/synchronization/lock_impl.h"
-
-namespace base {
-namespace internal {
-
-LockImpl::LockImpl() {
-  // The second parameter is the spin count, for short-held locks it avoid the
-  // contending thread from going to sleep which helps performance greatly.
-  ::InitializeCriticalSectionAndSpinCount(&native_handle_, 2000);
-}
-
-LockImpl::~LockImpl() {
-  ::DeleteCriticalSection(&native_handle_);
-}
-
-bool LockImpl::Try() {
-  if (::TryEnterCriticalSection(&native_handle_) != FALSE) {
-    return true;
-  }
-  return false;
-}
-
-void LockImpl::Lock() {
-  ::EnterCriticalSection(&native_handle_);
-}
-
-void LockImpl::Unlock() {
-  ::LeaveCriticalSection(&native_handle_);
-}
-
-}  // namespace internal
-}  // namespace base