Rename IFX_ stream names

fpdfsdk/fpdf_dataavail.cpp

Index: fpdfsdk/fpdf_dataavail.cpp
diff --git a/fpdfsdk/fpdf_dataavail.cpp b/fpdfsdk/fpdf_dataavail.cpp
index fb866ec229d96662fdc816e5d82cc1f32ba4aa4f..0bf67e9826c7c1056cf50080522223b6a3a084a5 100644
--- a/fpdfsdk/fpdf_dataavail.cpp
+++ b/fpdfsdk/fpdf_dataavail.cpp
@@ -57,14 +57,14 @@ class CFPDF_FileAvailWrap : public CPDF_DataAvail::FileAvail {
   FX_FILEAVAIL* m_pfileAvail;
 };
 
-class CFPDF_FileAccessWrap : public IFX_FileRead {
+class CFPDF_FileAccessWrap : public IFX_SeekableReadStream {
  public:
   CFPDF_FileAccessWrap() { m_pFileAccess = nullptr; }
   ~CFPDF_FileAccessWrap() override {}
 
   void Set(FPDF_FILEACCESS* pFile) { m_pFileAccess = pFile; }
 
-  // IFX_FileRead
+  // IFX_SeekableReadStream
   FX_FILESIZE GetSize() override { return m_pFileAccess->m_FileLen; }
 
   FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {