Allow the default generic font family settings to find the first available font

chrome/browser/ui/BUILD.gn

 # 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.
 
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 986 matching lines @@
       "webui/options/cookies_view_handler.cc",
       "webui/options/cookies_view_handler.h",
       "webui/options/core_options_handler.cc",
       "webui/options/core_options_handler.h",
       "webui/options/create_profile_handler.cc",
       "webui/options/create_profile_handler.h",
       "webui/options/easy_unlock_handler.cc",
       "webui/options/easy_unlock_handler.h",
       "webui/options/font_settings_handler.cc",
       "webui/options/font_settings_handler.h",
+      "webui/options/font_settings_utils.cc",
       "webui/options/font_settings_utils.h",
       "webui/options/font_settings_utils_linux.cc",
       "webui/options/font_settings_utils_mac.mm",
       "webui/options/font_settings_utils_win.cc",
       "webui/options/handler_options_handler.cc",
       "webui/options/handler_options_handler.h",
       "webui/options/help_overlay_handler.cc",
       "webui/options/help_overlay_handler.h",
       "webui/options/home_page_overlay_handler.cc",
       "webui/options/home_page_overlay_handler.h",
@@ skipping 2408 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }