Cleanup CFX_Font a bit.

core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp

Index: core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
diff --git a/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp b/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
index ed055459d4a97475c6a9cb92a540dc455778b4a6..a259a0bab4b838c42f528de46ba1a78c0966e056 100644
--- a/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
+++ b/core/src/fpdfapi/fpdf_edit/fpdf_edit_doc.cpp
@@ -980,7 +980,7 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   pFontDesc->SetAtInteger("Flags", flags);
   pFontDesc->SetAtInteger(
       "ItalicAngle",
-      pFont->m_pSubstFont ? pFont->m_pSubstFont->m_ItalicAngle : 0);
+      pFont->GetSubstFont() ? pFont->GetSubstFont()->m_ItalicAngle : 0);
   pFontDesc->SetAtInteger("Ascent", pFont->GetAscent());
   pFontDesc->SetAtInteger("Descent", pFont->GetDescent());
   FX_RECT bbox;
@@ -992,8 +992,8 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   pBBox->AddInteger(bbox.top);
   pFontDesc->SetAt("FontBBox", pBBox);
   int32_t nStemV = 0;
-  if (pFont->m_pSubstFont) {
-    nStemV = pFont->m_pSubstFont->m_Weight / 5;
+  if (pFont->GetSubstFont()) {
+    nStemV = pFont->GetSubstFont()->m_Weight / 5;
   } else {
     static const FX_CHAR stem_chars[] = {'i', 'I', '!', '1'};
     const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]);