Rework gfx::Font by moving platform-specific code into inner classes....

views/controls/button/native_button_gtk.cc

-// Copyright (c) 2010 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.
+// Copyright (c) 2010 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 "views/controls/button/native_button_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "views/controls/button/checkbox.h"
@@ skipping 21 matching lines @@
 
   gtk_button_set_label(GTK_BUTTON(native_view()),
                        WideToUTF8(native_button_->label()).c_str());
   preferred_size_ = gfx::Size();
 }
 
 void NativeButtonGtk::UpdateFont() {
   if (!native_view())
     return;
 
-  PangoFontDescription* pfd =
-      gfx::Font::PangoFontFromGfxFont(native_button_->font());
+  PangoFontDescription* pfd = native_button_->font().GetNativeFont();
   gtk_widget_modify_font(native_view(), pfd);
   pango_font_description_free(pfd);
   preferred_size_ = gfx::Size();
 }
 
 void NativeButtonGtk::UpdateEnabled() {
   SetEnabled(native_button_->IsEnabled());
 }
 
 void NativeButtonGtk::UpdateDefault() {
@@ skipping 227 matching lines @@
   return new NativeCheckboxGtk(checkbox);
 }
 
 // static
 NativeButtonWrapper* NativeButtonWrapper::CreateRadioButtonWrapper(
     RadioButton* radio_button) {
   return new NativeRadioButtonGtk(radio_button);
 }
 
 }  // namespace views