refactor CPDF_Font and subclasses

core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
index 30186304633a9a5654cad216b7a7965f9331764a..465c74a425b417e0a1b3b533c7250c9cb99475a1 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
@@ -1258,9 +1258,9 @@ CPDF_Font* CPDF_StreamContentParser::FindFont(const CFX_ByteString& name) {
   }
 
   CPDF_Font* pFont = m_pDocument->LoadFont(pFontDict);
-  if (pFont && pFont->GetType3Font()) {
-    pFont->GetType3Font()->SetPageResources(m_pResources);
-    pFont->GetType3Font()->CheckType3FontMetrics();
+  if (pFont && pFont->IsType3Font()) {
+    pFont->AsType3Font()->SetPageResources(m_pResources);
+    pFont->AsType3Font()->CheckType3FontMetrics();
   }
   return pFont;
 }
@@ -1336,7 +1336,7 @@ void CPDF_StreamContentParser::AddTextObject(CFX_ByteString* pStrs,
     return;
   }
   int textmode;
-  if (pFont->GetFontType() == PDFFONT_TYPE3) {
+  if (pFont->IsType3Font()) {
     textmode = 0;
   } else {
     textmode = m_pCurStates->m_TextState.GetObject()->m_TextMode;