Move gfx::Display/Screen to display::Display/Screen in aura/events

ui/aura/demo/demo_main.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 <memory>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/macros.h"
@@ skipping 134 matching lines @@
   // Create the message-loop here before creating the root window.
   base::MessageLoopForUI message_loop;
 
   base::PowerMonitor power_monitor(
       base::WrapUnique(new base::PowerMonitorDeviceSource));
 
   std::unique_ptr<aura::Env> env = aura::Env::CreateInstance();
   env->set_context_factory(context_factory.get());
   std::unique_ptr<aura::TestScreen> test_screen(
       aura::TestScreen::Create(gfx::Size()));
-  gfx::Screen::SetScreenInstance(test_screen.get());
+  display::Screen::SetScreenInstance(test_screen.get());
   std::unique_ptr<aura::WindowTreeHost> host(
       test_screen->CreateHostForPrimaryDisplay());
   std::unique_ptr<DemoWindowTreeClient> window_tree_client(
       new DemoWindowTreeClient(host->window()));
   aura::test::TestFocusClient focus_client;
   aura::client::SetFocusClient(host->window(), &focus_client);
 
   // Create a hierarchy of test windows.
   gfx::Rect window1_bounds(100, 100, 400, 400);
   DemoWindowDelegate window_delegate1(SK_ColorBLUE);
@@ skipping 33 matching lines @@
 int main(int argc, char** argv) {
   base::CommandLine::Init(argc, argv);
 
   // The exit manager is in charge of calling the dtors of singleton objects.
   base::AtExitManager exit_manager;
 
   base::i18n::InitializeICU();
 
   return DemoMain();
 }