Move to DesktopScreenX11::UpdateDeviceScaleFactor to TestApi

ui/views/test/desktop_screen_x11_test_api.cc

+// Copyright 2015 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/views/test/desktop_screen_x11_test_api.h"
+
+#include "ui/gfx/screen.h"
+#include "ui/views/widget/desktop_aura/desktop_screen_x11.h"
+
+namespace views {
+namespace test {
+
+void DesktopScreenX11TestApi::UpdateDisplays() {
+  DesktopScreenX11* screen =
+      static_cast<DesktopScreenX11*>(gfx::Screen::GetNativeScreen());
+  screen->ConfigureTimerFired();
+}
+
+}  // namespace test
+}  // namespace views