Sort includes in xfa/.

core/include/fxcrt/fx_stream.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_STREAM_H_
 #define CORE_INCLUDE_FXCRT_FX_STREAM_H_
 
 #include "core/include/fxcrt/fx_string.h"
+#include "core/include/fxcrt/fx_system.h"
 
 void* FX_OpenFolder(const FX_CHAR* path);
 void* FX_OpenFolder(const FX_WCHAR* path);
 FX_BOOL FX_GetNextFile(void* handle,
                        CFX_ByteString& filename,
                        FX_BOOL& bFolder);
 FX_BOOL FX_GetNextFile(void* handle,
                        CFX_WideString& filename,
                        FX_BOOL& bFolder);
 void FX_CloseFolder(void* handle);
@@ skipping 133 matching lines @@
   FX_FILESIZE GetPosition() override = 0;
   size_t ReadBlock(void* buffer, size_t size) override = 0;
 
   virtual FX_BOOL ReadNextBlock(FX_BOOL bRestart = FALSE) = 0;
   virtual const uint8_t* GetBlockBuffer() = 0;
   virtual size_t GetBlockSize() = 0;
   virtual FX_FILESIZE GetBlockOffset() = 0;
 };
 
 #endif  // CORE_INCLUDE_FXCRT_FX_STREAM_H_