Make CFX_Face::GetPixelSize() and GetCharMapEncodingIdByIndex() private

These are now only called inside CFX_Face.

Change-Id: I89b9ac196aa7426e32b561f3276f197472753abc
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/146671
Commit-Queue: Lei Zhang <thestig@chromium.org>
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

core/fxge/cfx_face.h

diff --git a/core/fxge/cfx_face.h b/core/fxge/cfx_face.h
index 9e123b6..9234165 100644
--- a/core/fxge/cfx_face.h
+++ b/core/fxge/cfx_face.h
@@ -114,12 +114,10 @@
   std::optional<fxge::FontEncoding> GetCurrentCharMapEncoding() const;
   CharMapId GetCharMapIdByIndex(size_t index) const;
   int GetCharMapPlatformIdByIndex(size_t index) const;
-  int GetCharMapEncodingIdByIndex(size_t index) const;
   fxge::FontEncoding GetCharMapEncodingByIndex(size_t index) const;
   size_t GetCharMapCount() const;
   int LoadGlyph(uint32_t glyph_index, bool scale);
   ByteString GetPostscriptName();
-  CFX_Size GetPixelSize() const;
   void SetCharMap(CharMap map);
   void SetCharMapByIndex(size_t index);
   bool SelectCharMap(fxge::FontEncoding encoding);
@@ -155,6 +153,9 @@
   FT_FaceRec* GetRec() { return rec_.get(); }
   const FT_FaceRec* GetRec() const { return rec_.get(); }
 
+  int GetCharMapEncodingIdByIndex(size_t index) const;
+  CFX_Size GetPixelSize() const;
+
   bool IsTricky() const;
   void AdjustVariationParams(int glyph_index, int dest_width, int weight);