Moves DefaultWindowResizer to common.

ash/wm/default_window_resizer.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 ASH_WM_DEFAULT_WINDOW_RESIZER_H_
-#define ASH_WM_DEFAULT_WINDOW_RESIZER_H_
-
-#include "ash/wm/common/window_resizer.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-
-namespace ash {
-namespace wm {
-class WmGlobals;
-}
-
-// WindowResizer is used by ToplevelWindowEventFilter to handle dragging, moving
-// or resizing a window. All coordinates passed to this are in the parent
-// windows coordiantes.
-class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
- public:
-  ~DefaultWindowResizer() override;
-
-  // Creates a new DefaultWindowResizer. The caller takes ownership of the
-  // returned object.
-  static DefaultWindowResizer* Create(wm::WindowState* window_state);
-
-  // Returns true if the drag will result in changing the window in anyway.
-  bool is_resizable() const { return details().is_resizable; }
-
-  bool changed_size() const {
-    return !(details().bounds_change & kBoundsChange_Repositions);
-  }
-
-  // WindowResizer:
-  void Drag(const gfx::Point& location, int event_flags) override;
-  void CompleteDrag() override;
-  void RevertDrag() override;
-
- private:
-  explicit DefaultWindowResizer(wm::WindowState* window_state);
-
-  // Set to true once Drag() is invoked and the bounds of the window change.
-  bool did_move_or_resize_;
-
-  wm::WmGlobals* globals_;
-
-  DISALLOW_COPY_AND_ASSIGN(DefaultWindowResizer);
-};
-
-}  // namespace aura
-
-#endif  // ASH_WM_DEFAULT_WINDOW_RESIZER_H_