Move base to DEPS

base/supports_user_data.cc

-// Copyright (c) 2012 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/supports_user_data.h"
-
-namespace base {
-
-SupportsUserData::SupportsUserData() {
-  // Harmless to construct on a different thread to subsequent usage.
-  thread_checker_.DetachFromThread();
-}
-
-SupportsUserData::Data* SupportsUserData::GetUserData(const void* key) const {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DataMap::const_iterator found = user_data_.find(key);
-  if (found != user_data_.end())
-    return found->second.get();
-  return NULL;
-}
-
-void SupportsUserData::SetUserData(const void* key, Data* data) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  user_data_[key] = linked_ptr<Data>(data);
-}
-
-void SupportsUserData::RemoveUserData(const void* key) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  user_data_.erase(key);
-}
-
-void SupportsUserData::DetachUserDataThread() {
-  thread_checker_.DetachFromThread();
-}
-
-SupportsUserData::~SupportsUserData() {
-  DCHECK(thread_checker_.CalledOnValidThread() || user_data_.empty());
-  DataMap local_user_data;
-  user_data_.swap(local_user_data);
-  // Now this->user_data_ is empty, and any destructors called transitively from
-  // the destruction of |local_user_data| will see it that way instead of
-  // examining a being-destroyed object.
-}
-
-}  // namespace base