Move core/fxcrt/include to core/fxcrt

core/fxcrt/include/cfx_retain_ptr.h

-// Copyright 2016 PDFium 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 CORE_FXCRT_INCLUDE_CFX_RETAIN_PTR_H_
-#define CORE_FXCRT_INCLUDE_CFX_RETAIN_PTR_H_
-
-#include <memory>
-
-#include "core/fxcrt/include/fx_memory.h"
-
-template <class T>
-class CFX_RetainPtr {
- public:
-  explicit CFX_RetainPtr(T* pObj) : m_pObj(pObj) {
-    if (m_pObj)
-      m_pObj->Retain();
-  }
-
-  CFX_RetainPtr() : CFX_RetainPtr(nullptr) {}
-  CFX_RetainPtr(const CFX_RetainPtr& that) : CFX_RetainPtr(that.Get()) {}
-  CFX_RetainPtr(CFX_RetainPtr&& that) { Swap(that); }
-
-  template <class U>
-  CFX_RetainPtr(const CFX_RetainPtr<U>& that)
-      : CFX_RetainPtr(that.Get()) {}
-
-  void Reset(T* obj = nullptr) {
-    if (obj)
-      obj->Retain();
-    m_pObj.reset(obj);
-  }
-
-  T* Get() const { return m_pObj.get(); }
-  void Swap(CFX_RetainPtr& that) { m_pObj.swap(that.m_pObj); }
-
-  CFX_RetainPtr& operator=(const CFX_RetainPtr& that) {
-    if (*this != that)
-      Reset(that.Get());
-    return *this;
-  }
-
-  bool operator==(const CFX_RetainPtr& that) const {
-    return Get() == that.Get();
-  }
-
-  bool operator!=(const CFX_RetainPtr& that) const { return !(*this == that); }
-
-  explicit operator bool() const { return !!m_pObj; }
-  T& operator*() const { return *m_pObj.get(); }
-  T* operator->() const { return m_pObj.get(); }
-
- private:
-  std::unique_ptr<T, ReleaseDeleter<T>> m_pObj;
-};
-
-#endif  // CORE_FXCRT_INCLUDE_CFX_RETAIN_PTR_H_