Mojo: more idiomatic C++ bindings

mojo/environment/buffer_tls_impl.cc

-// Copyright 2014 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 "mojo/environment/buffer_tls_impl.h"
-
-#include "base/lazy_instance.h"
-#include "base/threading/thread_local.h"
-
-namespace mojo {
-namespace internal {
-namespace {
-
-base::LazyInstance<base::ThreadLocalPointer<Buffer> >::Leaky lazy_tls_ptr =
-    LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-Buffer* GetCurrentBufferImpl() {
-  return lazy_tls_ptr.Pointer()->Get();
-}
-
-Buffer* SetCurrentBufferImpl(Buffer* buf) {
-  Buffer* old_buf = lazy_tls_ptr.Pointer()->Get();
-  lazy_tls_ptr.Pointer()->Set(buf);
-  return old_buf;
-}
-
-}  // namespace internal
-}  // namespace mojo