Updates subpixel positioning and hinting when DSF is changed

ui/gfx/platform_font_pango.cc

Index: ui/gfx/platform_font_pango.cc
diff --git a/ui/gfx/platform_font_pango.cc b/ui/gfx/platform_font_pango.cc
index 1cac87ad29d65667f814720bc5890a7d3812898b..aebc0b332eef4ff01f5237cc73550fd0cfb3d417 100644
--- a/ui/gfx/platform_font_pango.cc
+++ b/ui/gfx/platform_font_pango.cc
@@ -113,7 +113,8 @@ PlatformFontPango::PlatformFontPango(NativeFont native_font) {
     query.style |= gfx::Font::ITALIC;
 
   std::string font_family;
-  const FontRenderParams params = gfx::GetFontRenderParams(query, &font_family);
+  const FontRenderParams params =
+      gfx::GetSystemFontRenderParams(query, &font_family);
   InitFromDetails(skia::RefPtr<SkTypeface>(), font_family,
                   gfx::GetPangoFontSizeInPixels(native_font),
                   query.style, params);
@@ -126,7 +127,7 @@ PlatformFontPango::PlatformFontPango(const std::string& font_name,
   query.pixel_size = font_size_pixels;
   query.style = gfx::Font::NORMAL;
   InitFromDetails(skia::RefPtr<SkTypeface>(), font_name, font_size_pixels,
-                  query.style, gfx::GetFontRenderParams(query, NULL));
+                  query.style, gfx::GetSystemFontRenderParams(query, NULL));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -162,8 +163,9 @@ Font PlatformFontPango::DeriveFont(int size_delta, int style) const {
   query.pixel_size = new_size;
   query.style = style;
 
-  return Font(new PlatformFontPango(typeface, new_family, new_size, style,
-                                    gfx::GetFontRenderParams(query, NULL)));
+  return Font(
+      new PlatformFontPango(typeface, new_family, new_size, style,
+                            gfx::GetSystemFontRenderParams(query, NULL)));
 }
 
 int PlatformFontPango::GetHeight() const {