Fix a bad virtual keyword removal from commit 0f6b51c.

fpdfsdk/include/pdfwindow/PWL_FontMap.h

Index: fpdfsdk/include/pdfwindow/PWL_FontMap.h
diff --git a/fpdfsdk/include/pdfwindow/PWL_FontMap.h b/fpdfsdk/include/pdfwindow/PWL_FontMap.h
index c17483439c9e64707ffb10d3588db98cd3d046c0..c8c8722c11e44d9296154ffd9b5113074ab3789f 100644
--- a/fpdfsdk/include/pdfwindow/PWL_FontMap.h
+++ b/fpdfsdk/include/pdfwindow/PWL_FontMap.h
@@ -80,10 +80,11 @@ class CPWL_FontMap : public IFX_Edit_FontMap {
                            uint8_t nCharset);
 
  protected:
-  void Initial(const FX_CHAR* fontname = NULL);
-  CPDF_Document* GetDocument();
-  CPDF_Font* FindFontSameCharset(CFX_ByteString& sFontAlias, int32_t nCharset);
-  void AddedFont(CPDF_Font* pFont, const CFX_ByteString& sFontAlias);
+  virtual void Initialize();
+  virtual CPDF_Document* GetDocument();
+  virtual CPDF_Font* FindFontSameCharset(CFX_ByteString& sFontAlias,
+                                         int32_t nCharset);
+  virtual void AddedFont(CPDF_Font* pFont, const CFX_ByteString& sFontAlias);
 
   FX_BOOL KnowWord(int32_t nFontIndex, FX_WORD word);
 
@@ -126,9 +127,10 @@ class CPWL_DocFontMap : public CPWL_FontMap {
                   CPDF_Document* pAttachedDoc);
   ~CPWL_DocFontMap() override;
 
-  virtual CPDF_Document* GetDocument();
-
  private:
+  // CPWL_FontMap:
+  CPDF_Document* GetDocument() override;
+
   CPDF_Document* m_pAttachedDoc;
 };