Add place holder to move gfx::Display/Screen to ui/display

ui/display/win/screen_win.h

 // 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.
 
 #ifndef UI_DISPLAY_WIN_SCREEN_WIN_H_
 #define UI_DISPLAY_WIN_SCREEN_WIN_H_
 
 #include <windows.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "ui/display/display_export.h"
+#include "ui/display/screen.h"
 #include "ui/gfx/display_change_notifier.h"
 #include "ui/gfx/native_widget_types.h"
-#include "ui/gfx/screen.h"
 #include "ui/gfx/win/singleton_hwnd_observer.h"
 
 namespace gfx {
 class Display;
 class Point;
 class Rect;
 class Size;
 }   // namespace gfx
 
 namespace display {
 namespace win {
 
 class DisplayInfo;
 class ScreenWinDisplay;
 
-class DISPLAY_EXPORT ScreenWin : public gfx::Screen {
+class DISPLAY_EXPORT ScreenWin : public display::Screen {
  public:
   ScreenWin();
   ~ScreenWin() override;
 
   // Converts a screen physical point to a screen DIP point.
   // The DPI scale is performed relative to the display containing the physical
   // point.
   static gfx::Point ScreenToDIPPoint(const gfx::Point& pixel_point);
 
   // Converts a screen DIP point to a screen physical point.
@@ skipping 45 matching lines @@
   // The DPI scale is performed relative to the display nearest to |hwnd|.
   static gfx::Size DIPToScreenSize(HWND hwnd, const gfx::Size& dip_size);
 
   // Returns the HWND associated with the NativeView.
   virtual HWND GetHWNDFromNativeView(gfx::NativeView window) const;
 
   // Returns the NativeView associated with the HWND.
   virtual gfx::NativeWindow GetNativeWindowFromHWND(HWND hwnd) const;
 
  protected:
-  // gfx::Screen:
+  // display::Screen:
   gfx::Point GetCursorScreenPoint() override;
   gfx::NativeWindow GetWindowUnderCursor() override;
   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
   int GetNumDisplays() const override;
-  std::vector<gfx::Display> GetAllDisplays() const override;
-  gfx::Display GetDisplayNearestWindow(gfx::NativeView window) const override;
-  gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override;
-  gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override;
-  gfx::Display GetPrimaryDisplay() const override;
-  void AddObserver(gfx::DisplayObserver* observer) override;
-  void RemoveObserver(gfx::DisplayObserver* observer) override;
+  std::vector<display::Display> GetAllDisplays() const override;
+  display::Display GetDisplayNearestWindow(
+      gfx::NativeView window) const override;
+  display::Display GetDisplayNearestPoint(
+      const gfx::Point& point) const override;
+  display::Display GetDisplayMatching(
+      const gfx::Rect& match_rect) const override;
+  display::Display GetPrimaryDisplay() const override;
+  void AddObserver(display::DisplayObserver* observer) override;
+  void RemoveObserver(display::DisplayObserver* observer) override;
 
   void UpdateFromDisplayInfos(const std::vector<DisplayInfo>& display_infos);
 
   // Virtual to support mocking by unit tests.
   virtual void Initialize();
   virtual MONITORINFOEX MonitorInfoFromScreenPoint(
       const gfx::Point& screen_point) const;
   virtual MONITORINFOEX MonitorInfoFromScreenRect(const gfx::Rect& screen_rect)
       const;
   virtual MONITORINFOEX MonitorInfoFromWindow(HWND hwnd, DWORD default_options)
@@ skipping 27 matching lines @@
   // Current list of ScreenWinDisplays.
   std::vector<ScreenWinDisplay> screen_win_displays_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenWin);
 };
 
 }  // namespace win
 }  // namespace display
 
 #endif  // UI_DISPLAY_WIN_SCREEN_WIN_H_