Replace CFX_DSPATemplate with std::binary_search.

xfa/fgas/crt/fgas_algorithm.h

-// Copyright 2014 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 XFA_FGAS_CRT_FGAS_ALGORITHM_H_
-#define XFA_FGAS_CRT_FGAS_ALGORITHM_H_
-
-#include <cstdint>
-
-#include "core/fxcrt/include/fx_basic.h"
-
-template <class baseType>
-class CFX_DSPATemplate {
- public:
-  int32_t Lookup(const baseType& find, const baseType* pArray, int32_t iCount) {
-    ASSERT(pArray);
-    if (iCount < 1)
-      return -1;
-
-    int32_t iStart = 0, iEnd = iCount - 1, iMid;
-    do {
-      iMid = (iStart + iEnd) / 2;
-      const baseType& v = pArray[iMid];
-      if (find == v)
-        return iMid;
-      if (find < v)
-        iEnd = iMid - 1;
-      else
-        iStart = iMid + 1;
-    } while (iStart <= iEnd);
-    return -1;
-  }
-};
-
-#endif  // XFA_FGAS_CRT_FGAS_ALGORITHM_H_