Remove IsDIPEnabled from Screen

ash/display/screen_ash.h

 // Copyright 2014 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 ASH_DISPLAY_SCREEN_ASH_H_
 #define ASH_DISPLAY_SCREEN_ASH_H_
 
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "base/observer_list.h"
@@ skipping 43 matching lines @@
 
   // Returns a gfx::Display object for secondary display. Returns
   // invalid display if there is no secondary display connected.
   static const gfx::Display& GetSecondaryDisplay();
 
   // Returns a gfx::Display object for the specified id.  Returns
   // invalid display if no such display is connected.
   static const gfx::Display& GetDisplayForId(int64 display_id);
 
   // gfx::Screen overrides:
-  virtual bool IsDIPEnabled() override;
   virtual gfx::Point GetCursorScreenPoint() override;
   virtual gfx::NativeWindow GetWindowUnderCursor() override;
   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
       override;
   virtual int GetNumDisplays() const override;
   virtual std::vector<gfx::Display> GetAllDisplays() const override;
   virtual gfx::Display GetDisplayNearestWindow(
       gfx::NativeView view) const override;
   virtual gfx::Display GetDisplayNearestPoint(
       const gfx::Point& point) const override;
@@ skipping 16 matching lines @@
   gfx::Screen* CloneForShutdown();
 
   ObserverList<gfx::DisplayObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenAsh);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_SCREEN_ASH_H_