Re-land: RenderTextHarfBuzz: Set font render parameters in font data functions

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 80055b0130624a7adf16addb207ed440cd247e2e..6a79c4ae630291f481180fe4ed2cca025f355fe1 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -178,6 +178,11 @@ struct Line {
 skia::RefPtr<SkTypeface> CreateSkiaTypeface(const std::string& family,
                                             int style);
 
+// Applies the given FontRenderParams to a Skia |paint|.
+void ApplyRenderParams(const FontRenderParams& params,
+                       bool background_is_transparent,
+                       SkPaint* paint);
+
 }  // namespace internal
 
 // RenderText represents an abstract model of styled text and its corresponding