Refactor screen/monitor so that gfx::Screen returns monitor object.

ui/aura/monitor.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_AURA_MONITOR_H_
-#define UI_AURA_MONITOR_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "ui/aura/aura_export.h"
-#include "ui/gfx/insets.h"
-#include "ui/gfx/rect.h"
-
-namespace aura {
-
-class AURA_EXPORT Monitor {
- public:
-  Monitor();
-  ~Monitor();
-
-  // Sets/gets monitor's bounds in |gfx::screen|'s coordinates,
-  // which is relative to the primary screen's origin.
-  void set_bounds(const gfx::Rect& bounds) { bounds_ = bounds;}
-  const gfx::Rect& bounds() const { return bounds_; };
-
-  // Sets/gets monitor's size.
-  void set_size(const gfx::Size& size) { bounds_.set_size(size); }
-  const gfx::Size& size() const { return bounds_.size(); }
-
-  // Sets/gets monitor's workarea insets.
-  void set_work_area_insets(const gfx::Insets& insets) {
-    work_area_insets_ = insets;
-  }
-  const gfx::Insets& work_area_insets() const { return work_area_insets_; }
-
-  // Returns the monitor's work area.
-  gfx::Rect GetWorkAreaBounds() const;
-
- private:
-  // Insets for the work area.
-  gfx::Insets work_area_insets_;
-
-  gfx::Rect bounds_;
-
-  DISALLOW_COPY_AND_ASSIGN(Monitor);
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_MONITOR_H_