mash: Partially migrate WorkspaceController to ash common.

ash/shelf/shelf_widget.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_SHELF_SHELF_WIDGET_H_
 #define ASH_SHELF_SHELF_WIDGET_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shelf/shelf_background_animator.h"
 #include "ash/common/shelf/shelf_background_animator_observer.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
 #include "base/macros.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
 
 namespace ash {
 class FocusCycler;
 class Shelf;
 class ShelfLayoutManager;
 class StatusAreaWidget;
 class WmShelfAura;
 class WmWindow;
-class WorkspaceController;
 
 class ASH_EXPORT ShelfWidget : public views::Widget,
                                public views::WidgetObserver,
                                public ShelfBackgroundAnimatorObserver,
                                public ShelfLayoutManagerObserver {
  public:
   ShelfWidget(WmWindow* shelf_container,
               WmWindow* status_container,
-              WmShelfAura* wm_shelf_aura,
-              WorkspaceController* workspace_controller);
+              WmShelfAura* wm_shelf_aura);

[James Cook, 2016/08/11 23:27:35]

so nice to have fewer dependencies

[msw, 2016/08/12 00:17:15]

Acknowledged.

   ~ShelfWidget() override;
 
   // Returns if shelf alignment option is enabled, and the user is able to
   // adjust the alignment (guest and supervised mode users cannot for example).
   static bool ShelfAlignmentAllowed();
 
   void OnShelfAlignmentChanged();
   ShelfAlignment GetAlignment() const;
 
   // Sets the shelf's background type.
@@ skipping 71 matching lines @@
   DelegateView* delegate_view_;
   ShelfBackgroundAnimator background_animator_;
   bool activating_as_fallback_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfWidget);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_WIDGET_H_