Support getting the font list in Pepper. This currently only works out of

content/common/font_list_gtk.cc

Index: content/common/font_list_gtk.cc
===================================================================
--- content/common/font_list_gtk.cc	(revision 85492)
+++ content/common/font_list_gtk.cc	(working copy)
@@ -2,17 +2,19 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/ui/webui/options/font_settings_utils.h"
+#include "content/common/font_list.h"
 
+#include <pango/pango.h>
+#include <pango/pangocairo.h>
+
 #include <set>
 #include <string>
 
-#include <pango/pango.h>
-#include <pango/pangocairo.h>
-
 #include "base/values.h"
 
-ListValue* FontSettingsUtilities::GetFontsList() {
+namespace content {
+
+ListValue* GetFontList_SlowBlocking() {
   ListValue* font_list = new ListValue;
 
   PangoFontMap* font_map = ::pango_cairo_font_map_get_default();
@@ -38,6 +40,4 @@
   return font_list;
 }
 
-void FontSettingsUtilities::ValidateSavedFonts(PrefService* prefs) {
-  // nothing to do for GTK.
-}
+}  // namespace content