Move ScopedSetInsertion to third_party/base/stl_util.h

core/include/fxcrt/fx_ext.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 CORE_INCLUDE_FXCRT_FX_EXT_H_
 #define CORE_INCLUDE_FXCRT_FX_EXT_H_
 
 #include <cctype>
 #include <cwctype>
 
 #include "core/include/fxcrt/fx_basic.h"
 
+// TODO(thestig) Using unique_ptr with ReleaseDeleter is still not ideal.
+// Come up or wait for something better. This appears in this file rather
+// than fx_stream.h due to include ordering restrictions.
+using ScopedFileStream =
+    std::unique_ptr<IFX_FileStream, ReleaseDeleter<IFX_FileStream>>;
+
 FX_FLOAT FXSYS_tan(FX_FLOAT a);
 FX_FLOAT FXSYS_logb(FX_FLOAT b, FX_FLOAT x);
 FX_FLOAT FXSYS_strtof(const FX_CHAR* pcsStr,
                       int32_t iLength = -1,
                       int32_t* pUsedLen = NULL);
 FX_FLOAT FXSYS_wcstof(const FX_WCHAR* pwsStr,
                       int32_t iLength = -1,
                       int32_t* pUsedLen = NULL);
 FX_WCHAR* FXSYS_wcsncpy(FX_WCHAR* dstStr, const FX_WCHAR* srcStr, size_t count);
 int32_t FXSYS_wcsnicmp(const FX_WCHAR* s1, const FX_WCHAR* s2, size_t count);
@@ skipping 98 matching lines @@
           j -= gap;
         }
         pArray[j + gap] = v1;
       }
       gap >>= 1;
     }
   }
 };
 
 #endif  // CORE_INCLUDE_FXCRT_FX_EXT_H_