Make more concrete stream classes private to .cpp files

fpdfsdk/fpdfview.cpp

Index: fpdfsdk/fpdfview.cpp
diff --git a/fpdfsdk/fpdfview.cpp b/fpdfsdk/fpdfview.cpp
index 633cbe879e1274a6a16c0af93b1afb034e3d4576..bb4cd48a18b77eb3cbba6a9e8f4222f85637382d 100644
--- a/fpdfsdk/fpdfview.cpp
+++ b/fpdfsdk/fpdfview.cpp
@@ -246,6 +246,24 @@ bool CFPDF_FileStream::Flush() {
 }
 #endif  // PDF_ENABLE_XFA
 
+class CPDF_CustomAccess final : public IFX_SeekableReadStream {

[npm, 2016/12/01 21:21:49]

Can this go inside namespace?

[Tom Sepez, 2016/12/01 21:33:45]

Done.

+ public:
+  explicit CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess);
+  ~CPDF_CustomAccess() override {}
+
+  // IFX_SeekableReadStream
+  FX_FILESIZE GetSize() override;
+  void Release() override;
+  bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
+
+ private:
+  FPDF_FILEACCESS m_FileAccess;
+};
+
+IFX_SeekableReadStream* MakeSeekableReadStream(FPDF_FILEACCESS* pFileAccess) {
+  return new CPDF_CustomAccess(pFileAccess);
+}
+
 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
     : m_FileAccess(*pFileAccess) {}