RenderTextMac: Cache the SkTypeface on the TextRun

ui/gfx/render_text.h

Index: ui/gfx/render_text.h
diff --git a/ui/gfx/render_text.h b/ui/gfx/render_text.h
index 6b0c489cf502a8ac6e8cea80dd83b320f8baeb66..d1687e2cf85ce4c29b9c329e04f0d341b43bae1f 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -62,7 +62,6 @@ class GFX_EXPORT SkiaTextRenderer {
                            bool subpixel_rendering_suppressed);
   void SetTypeface(SkTypeface* typeface);
   void SetTextSize(SkScalar size);
-  void SetFontWithStyle(const Font& font, int font_style);
   void SetForegroundColor(SkColor foreground);
   void SetShader(sk_sp<SkShader> shader);
   // Sets underline metrics to use if the text will be drawn with an underline.
@@ -186,10 +185,6 @@ struct Line {
   int baseline;
 };
 
-// Creates an SkTypeface from a font and a |gfx::Font::FontStyle|.
-// May return NULL.
-skia::RefPtr<SkTypeface> CreateSkiaTypeface(const gfx::Font& font, int style);
-
 // Applies the given FontRenderParams to a Skia |paint|.
 void ApplyRenderParams(const FontRenderParams& params,
                        bool subpixel_rendering_suppressed,