Rename PlatformScreen to ScreenManager.

services/ui/display/platform_screen_delegate.h

-// Copyright 2016 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 SERVICES_UI_DISPLAY_PLATFORM_SCREEN_DELEGATE_H_
-#define SERVICES_UI_DISPLAY_PLATFORM_SCREEN_DELEGATE_H_
-
-#include <stdint.h>
-
-namespace gfx {
-class Rect;
-class Size;
-}
-
-namespace display {
-
-class PlatformScreen;
-struct ViewportMetrics;
-
-// The PlatformScreenDelegate will be informed of changes to the physical
-// and/or virtual displays by PlatformScreen.
-class PlatformScreenDelegate {
- public:
-  // Called when a display is added. |id| is the display id of the new display
-  // and |metrics| contains display viewport information.
-  virtual void OnDisplayAdded(int64_t id, const ViewportMetrics& metrics) = 0;
-
-  // Called when a display is removed. |id| is the display id of the display
-  // that was removed.
-  virtual void OnDisplayRemoved(int64_t id) = 0;
-
-  // Called when a display is modified. |id| is the display id of the modified
-  // display and |metrics| contains updated display viewport information.
-  virtual void OnDisplayModified(int64_t id,
-                                 const ViewportMetrics& metrics) = 0;
-
-  // Called when the primary display is changed.
-  virtual void OnPrimaryDisplayChanged(int64_t primary_display_id) = 0;
-
- protected:
-  virtual ~PlatformScreenDelegate() {}
-};
-
-}  // namespace display
-
-#endif  // SERVICES_UI_DISPLAY_PLATFORM_SCREEN_DELEGATE_H_