LibGfx+LibWeb: Store Typeface and Font-related types in RefPtr to const

Author: https://github.com/ADKaster
Commit: be2dd91289
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4362
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/Hendiadyoin1

Libraries/LibGfx/TextLayout.h

@@ -44,7 +44,7 @@ public:
         Rtl,
     };
 
-    GlyphRun(Vector<DrawGlyph>&& glyphs, NonnullRefPtr<Font> font, TextType text_type, float width)
+    GlyphRun(Vector<DrawGlyph>&& glyphs, NonnullRefPtr<Font const> font, TextType text_type, float width)
         : m_glyphs(move(glyphs))
         , m_font(move(font))
         , m_text_type(text_type)
@@ -63,7 +63,7 @@ public:
 
 private:
     Vector<DrawGlyph> m_glyphs;
-    NonnullRefPtr<Font> m_font;
+    NonnullRefPtr<Font const> m_font;
     TextType m_text_type;
     float m_width { 0 };
 };