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..437d2e7ca59734fb2846eab976cd306d885af335 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -52,7 +52,7 @@ class SkiaTextRenderer {
   ~SkiaTextRenderer();
 
   void SetDrawLooper(SkDrawLooper* draw_looper);
-  void SetFontRenderParams(const FontRenderParams& params,
+  void SetFontRenderParams(FontRenderParams params,
                            bool background_is_transparent);
   void SetTypeface(SkTypeface* typeface);
   void SetTextSize(SkScalar size);
@@ -178,6 +178,9 @@ 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, SkPaint* paint);
+
 }  // namespace internal
 
 // RenderText represents an abstract model of styled text and its corresponding