Set the font family for the "system-ui" generic font family on Linux

chrome/browser/renderer_preferences_util.cc

 // Copyright (c) 2012 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 "chrome/browser/renderer_preferences_util.h"
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/public/common/webrtc_ip_handling_policy.h"
 #include "third_party/skia/include/core/SkColor.h"
 
+#if defined(OS_LINUX)
+#include "ui/base/resource/resource_bundle.h"
+#endif
+
 #if defined(OS_LINUX) || defined(OS_ANDROID)
 #include "ui/gfx/font_render_params.h"
 #endif
 
 #if defined(TOOLKIT_VIEWS)
 #include "ui/views/controls/textfield/textfield.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include "ui/base/cocoa/defaults_utils.h"
@@ skipping 127 matching lines @@
   CR_DEFINE_STATIC_LOCAL(const gfx::FontRenderParams, params,
       (gfx::GetFontRenderParams(gfx::FontRenderParamsQuery(), NULL)));
   prefs->should_antialias_text = params.antialiasing;
   prefs->use_subpixel_positioning = params.subpixel_positioning;
   prefs->hinting = params.hinting;
   prefs->use_autohinter = params.autohinter;
   prefs->use_bitmaps = params.use_bitmaps;
   prefs->subpixel_rendering = params.subpixel_rendering;
 #endif
 
+#if defined(OS_LINUX)
+  prefs->system_font_family_name = ui::ResourceBundle::GetSharedInstance()
+      .GetFontWithDelta(0).GetFontName();
+#endif
+
 #if !defined(OS_MACOSX)
   prefs->plugin_fullscreen_allowed =
       pref_service->GetBoolean(prefs::kFullscreenAllowed);
 #endif
 }
 
 }  // namespace renderer_preferences_util