Support FontRenderParams on Win; fix RenderTextHarfBuzz.

ui/gfx/render_text.cc

Index: ui/gfx/render_text.cc
diff --git a/ui/gfx/render_text.cc b/ui/gfx/render_text.cc
index 4e7281c11695d4b7b70beb85b36e04227f425936..bf4c9a9b7ff0aa68780338a9a11c81efc453bdf6 100644
--- a/ui/gfx/render_text.cc
+++ b/ui/gfx/render_text.cc
@@ -198,12 +198,12 @@ void SkiaTextRenderer::SetDrawLooper(SkDrawLooper* draw_looper) {
   paint_.setLooper(draw_looper);
 }
 
-void SkiaTextRenderer::SetFontSmoothingSettings(bool antialiasing,
-                                                bool subpixel_rendering,
-                                                bool subpixel_positioning) {
-  paint_.setAntiAlias(antialiasing);
-  paint_.setLCDRenderText(subpixel_rendering);
-  paint_.setSubpixelText(subpixel_positioning);
+void SkiaTextRenderer::SetFontRenderParams(const FontRenderParams& params,
+                                           bool background_is_transparent) {
+  paint_.setAntiAlias(params.antialiasing);
+  paint_.setLCDRenderText(!background_is_transparent &&
+      params.subpixel_rendering != FontRenderParams::SUBPIXEL_RENDERING_NONE);
+  paint_.setSubpixelText(params.subpixel_positioning);
 }
 
 void SkiaTextRenderer::SetFontHinting(SkPaint::Hinting hinting) {