Move core/fxcrt/include to core/fxcrt

core/fxcrt/include/cfx_string_pool_template.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_FXCRT_INCLUDE_CFX_STRING_POOL_TEMPLATE_H_
-#define CORE_FXCRT_INCLUDE_CFX_STRING_POOL_TEMPLATE_H_
-
-#include <unordered_set>
-
-#include "core/fxcrt/include/fx_string.h"
-
-template <typename StringType>
-class CFX_StringPoolTemplate {
- public:
-  StringType Intern(const StringType& str) { return *m_Pool.insert(str).first; }
-  void Clear() { m_Pool.clear(); }
-
- private:
-  std::unordered_set<StringType> m_Pool;
-};
-
-using CFX_ByteStringPool = CFX_StringPoolTemplate<CFX_ByteString>;
-using CFX_WideStringPool = CFX_StringPoolTemplate<CFX_WideString>;
-
-extern template class CFX_StringPoolTemplate<CFX_ByteString>;
-extern template class CFX_StringPoolTemplate<CFX_WideString>;
-
-#endif  // CORE_FXCRT_INCLUDE_CFX_STRING_POOL_TEMPLATE_H_