Rename CPDF_CountedObject to CFX_WeakPtr::Handle

core/fpdfapi/fpdf_page/cpdf_countedobject.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.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_
-#define CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_
-
-#include "core/fpdfapi/fpdf_page/cpdf_pattern.h"
-#include "core/fpdfapi/fpdf_page/include/cpdf_colorspace.h"
-#include "core/fxcrt/include/fx_system.h"
-
-template <class T>
-class CPDF_CountedObject {
- public:
-  explicit CPDF_CountedObject(T* ptr) : m_nCount(1), m_pObj(ptr) {}
-  void reset(T* ptr) {  // CAUTION: tosses prior ref counts.
-    m_nCount = 1;
-    m_pObj = ptr;
-  }
-  void clear() {  // Now you're all weak ptrs ...
-    // Guard against accidental re-entry.
-    T* pObj = m_pObj;
-    m_pObj = nullptr;
-    delete pObj;
-  }
-  T* get() const { return m_pObj; }
-  T* AddRef() {
-    ASSERT(m_pObj);
-    ++m_nCount;
-    return m_pObj;
-  }
-  void RemoveRef() {
-    if (m_nCount)
-      --m_nCount;
-  }
-  size_t use_count() const { return m_nCount; }
-
- protected:
-  size_t m_nCount;
-  T* m_pObj;
-};
-using CPDF_CountedColorSpace = CPDF_CountedObject<CPDF_ColorSpace>;
-using CPDF_CountedPattern = CPDF_CountedObject<CPDF_Pattern>;
-
-#endif  // CORE_FPDFAPI_FPDF_PAGE_CPDF_COUNTEDOBJECT_H_