Add gfx::Screen::IsEnabled()

ui/gfx/screen.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_GFX_SCREEN_H_
 #define UI_GFX_SCREEN_H_
 #pragma once
 
 #include "ui/base/ui_export.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 10 matching lines @@
  public:
   virtual ~Screen() {}
 
 #if defined(USE_AURA)
   // Sets the instance to use. This takes owernship of |screen|, deleting the
   // old instance. This is used on aura to avoid circular dependencies between
   // ui and aura.
   static void SetInstance(ScreenImpl* screen);
 #endif
 
+  // True if DIP is enabled.
+  static bool IsDIPEnabled();
+
   // Returns the current absolute position of the mouse pointer.
   static gfx::Point GetCursorScreenPoint();
 
   // Returns the window under the cursor.
   static gfx::NativeWindow GetWindowAtCursorScreenPoint();
 
   // Returns the number of monitors.
   // Mirrored displays are excluded; this method is intended to return the
   // number of distinct, usable displays.
   static int GetNumMonitors();
 
   // Returns the monitor nearest the specified window.
   static gfx::Monitor GetMonitorNearestWindow(gfx::NativeView view);
 
   // Returns the the monitor nearest the specified point.
   static gfx::Monitor GetMonitorNearestPoint(const gfx::Point& point);
 
   // Returns the bounds of the work area of the primary monitor.
   static gfx::Monitor GetPrimaryMonitor();
 
   // Returns the monitor that most closely intersects the provided bounds.
   static gfx::Monitor GetMonitorMatching(const gfx::Rect& match_rect);
 };
 
 }  // namespace gfx
 
 #endif  // VIEWS_SCREEN_H_