Move base to DEPS

base/supports_user_data.h

-// 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.
-
-#ifndef BASE_SUPPORTS_USER_DATA_H_
-#define BASE_SUPPORTS_USER_DATA_H_
-
-#include <map>
-
-#include "base/base_export.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "base/threading/thread_checker.h"
-
-namespace base {
-
-// This is a helper for classes that want to allow users to stash random data by
-// key. At destruction all the objects will be destructed.
-class BASE_EXPORT SupportsUserData {
- public:
-  SupportsUserData();
-
-  // Derive from this class and add your own data members to associate extra
-  // information with this object. Alternatively, add this as a public base
-  // class to any class with a virtual destructor.
-  class BASE_EXPORT Data {
-   public:
-    virtual ~Data() {}
-  };
-
-  // The user data allows the clients to associate data with this object.
-  // Multiple user data values can be stored under different keys.
-  // This object will TAKE OWNERSHIP of the given data pointer, and will
-  // delete the object if it is changed or the object is destroyed.
-  Data* GetUserData(const void* key) const;
-  void SetUserData(const void* key, Data* data);
-  void RemoveUserData(const void* key);
-
-  // SupportsUserData is not thread-safe, and on debug build will assert it is
-  // only used on one thread. Calling this method allows the caller to hand
-  // the SupportsUserData instance across threads. Use only if you are taking
-  // full control of the synchronization of that hand over.
-  void DetachUserDataThread();
-
- protected:
-  virtual ~SupportsUserData();
-
- private:
-  typedef std::map<const void*, linked_ptr<Data> > DataMap;
-
-  // Externally-defined data accessible by key.
-  DataMap user_data_;
-  // Guards usage of |user_data_|
-  ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(SupportsUserData);
-};
-
-// Adapter class that releases a refcounted object when the
-// SupportsUserData::Data object is deleted.
-template <typename T>
-class UserDataAdapter : public base::SupportsUserData::Data {
- public:
-  static T* Get(const SupportsUserData* supports_user_data, const void* key) {
-    UserDataAdapter* data =
-      static_cast<UserDataAdapter*>(supports_user_data->GetUserData(key));
-    return data ? static_cast<T*>(data->object_.get()) : NULL;
-  }
-
-  UserDataAdapter(T* object) : object_(object) {}
-  T* release() { return object_.release(); }
-
- private:
-  scoped_refptr<T> object_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserDataAdapter);
-};
-
-}  // namespace base
-
-#endif  // BASE_SUPPORTS_USER_DATA_H_