Moves WorkspaceController to ash/common

ash/wm/workspace_controller.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_WORKSPACE_CONTROLLER_H_
-#define ASH_WM_WORKSPACE_CONTROLLER_H_
-
-#include <memory>
-
-#include "ash/ash_export.h"
-#include "ash/common/wm/workspace/workspace_types.h"
-#include "base/macros.h"
-
-namespace ash {
-class WmWindow;
-class WorkspaceControllerTestHelper;
-class WorkspaceEventHandler;
-class WorkspaceLayoutManager;
-class WorkspaceLayoutManagerBackdropDelegate;
-
-// WorkspaceController acts as a central place that ties together all the
-// various workspace pieces.
-class ASH_EXPORT WorkspaceController {
- public:
-  explicit WorkspaceController(WmWindow* viewport);
-  virtual ~WorkspaceController();
-
-  // Returns the current window state.
-  wm::WorkspaceWindowState GetWindowState() const;
-
-  // Starts the animation that occurs on first login.
-  void DoInitialAnimation();
-
-  // Add a delegate which adds a backdrop behind the top window of the default
-  // workspace.
-  void SetMaximizeBackdropDelegate(
-      std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate> delegate);
-
-  WorkspaceLayoutManager* layout_manager() { return layout_manager_; }
-
- private:
-  friend class WorkspaceControllerTestHelper;
-
-  WmWindow* viewport_;
-  std::unique_ptr<WorkspaceEventHandler> event_handler_;
-
-  // Owned by |viewport_|.
-  WorkspaceLayoutManager* layout_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WORKSPACE_CONTROLLER_H_