Updates subpixel positioning and hinting when DSF is changed

ui/gfx/font_render_params_mac.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/font_render_params.h"
 
 #include "base/logging.h"
 #include "base/macros.h"
 
 namespace gfx {
 
 namespace {
 
 // Returns params that match SkiaTextRenderer's default render settings.
 FontRenderParams LoadDefaults() {
   FontRenderParams params;
   params.antialiasing = true;
   params.autohinter = false;
   params.use_bitmaps = true;
   params.subpixel_rendering = FontRenderParams::SUBPIXEL_RENDERING_RGB;
   params.subpixel_positioning = true;
   params.hinting = FontRenderParams::HINTING_MEDIUM;
 
   return params;
 }
 
 }  // namespace
 
-FontRenderParams GetFontRenderParams(const FontRenderParamsQuery& query,
-                                     std::string* family_out) {
+FontRenderParams GetSystemFontRenderParams(const FontRenderParamsQuery& query,
+                                           std::string* family_out) {
   if (family_out)
     NOTIMPLEMENTED();
   // TODO: Query the OS for font render settings instead of returning defaults.
   CR_DEFINE_STATIC_LOCAL(const gfx::FontRenderParams, params, (LoadDefaults()));
   return params;
 }
 
 }  // namespace gfx