Updates subpixel positioning and hinting when DSF is changed

ui/gfx/font.cc

Index: ui/gfx/font.cc
diff --git a/ui/gfx/font.cc b/ui/gfx/font.cc
index 1b5f1d8189a7ef8b9f4c246c4b619d4fa4cb4d60..8e9631b3bee16286bec4c41f1066faa513eeb744 100644
--- a/ui/gfx/font.cc
+++ b/ui/gfx/font.cc
@@ -74,8 +74,13 @@ int Font::GetFontSize() const {
   return platform_font_->GetFontSize();
 }
 
-const FontRenderParams& Font::GetFontRenderParams() const {
-  return platform_font_->GetFontRenderParams();
+FontRenderParams Font::GetFontRenderParams() const {
+  FontRenderParams params = platform_font_->GetFontRenderParams();
+  gfx::FontRenderParamsRewriter* rewriter =
+      gfx::FontRenderParamsRewriter::GetInstance();
+  if (rewriter)
+    rewriter->RewriteParams(&params);
+  return params;
 }
 
 NativeFont Font::GetNativeFont() const {