Remove now-unnecessary wrappers around gfx::Screen::GetScreen()

ash/display/event_transformation_handler.cc

 // Copyright (c) 2013 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 "ash/display/event_transformation_handler.h"
 
 #include <cmath>
 
 #include "ash/display/display_info.h"
 #include "ash/display/display_manager.h"
-#include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/events/event.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/screen.h"
 #include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
@@ skipping 14 matching lines @@
 void EventTransformationHandler::OnScrollEvent(ui::ScrollEvent* event) {
   if (transformation_mode_ == TRANSFORM_NONE)
     return;
 
   // It is unnecessary to scale the event for the device scale factor since
   // the event locations etc. are already in DIP.
   gfx::Point point_in_screen(event->location());
   aura::Window* target = static_cast<aura::Window*>(event->target());
   ::wm::ConvertPointToScreen(target, &point_in_screen);
   const gfx::Display& display =
-      Shell::GetScreen()->GetDisplayNearestPoint(point_in_screen);
+      gfx::Screen::GetScreen()->GetDisplayNearestPoint(point_in_screen);
 
   // Apply some additional scaling if the display is non-integrated.
   if (!display.IsInternal())
     event->Scale(kBoostForNonIntegrated);
 }
 
 }  // namespace ash