Refcount all the IFX_ stream classes all the time.

core/fpdfapi/parser/fpdf_parser_utility.h

Index: core/fpdfapi/parser/fpdf_parser_utility.h
diff --git a/core/fpdfapi/parser/fpdf_parser_utility.h b/core/fpdfapi/parser/fpdf_parser_utility.h
index 589171f1a49fecd079608ba8a79c86ce691cd574..29f54ee853f5537ab5680d1b311951942c1ffd81 100644
--- a/core/fpdfapi/parser/fpdf_parser_utility.h
+++ b/core/fpdfapi/parser/fpdf_parser_utility.h
@@ -7,6 +7,7 @@
 #ifndef CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_
 #define CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
 
@@ -33,7 +34,7 @@ inline bool PDFCharIsLineEnding(uint8_t c) {
   return c == '\r' || c == '\n';
 }
 
-int32_t GetHeaderOffset(IFX_SeekableReadStream* pFile);
+int32_t GetHeaderOffset(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile);
 int32_t GetDirectInteger(CPDF_Dictionary* pDict, const CFX_ByteString& key);
 
 #endif  // CORE_FPDFAPI_PARSER_FPDF_PARSER_UTILITY_H_