Enables ScreenPinningController for mash/mus

ash/common/wm_shell.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 ASH_COMMON_WM_SHELL_H_
 #define ASH_COMMON_WM_SHELL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 117 matching lines @@
 
   // Called when a modal window is removed. It will activate another modal
   // window if any, or remove modal screens on all displays.
   void OnModalWindowRemoved(WmWindow* removed);
 
   // For testing only: set simulation that a modal window is open
   void SimulateModalWindowOpenForTesting(bool modal_window_open) {
     simulate_modal_window_open_for_testing_ = modal_window_open;
   }
 
-  // Returns true if a window is currently pinned.
-  virtual bool IsPinned() = 0;
-
-  // Sets/Unsets the |window| to as a pinned window. If this is called with a
-  // window with WINDOW_STATE_TYPE_PINNED state, then this sets the |window|
-  // as a pinned window. Otherwise, this unsets it.
-  // For setting, a caller needs to guarantee that no windows are set
-  // as pinned window. For unsetting, a caller needs to guarantee that the
-  // |window| is the one which is currently set as a pinned window via previous
-  // this function invocation.
-  virtual void SetPinnedWindow(WmWindow* window) = 0;
-
   // See aura::client::CursorClient for details on these.
   virtual void LockCursor() = 0;
   virtual void UnlockCursor() = 0;
   virtual bool IsMouseEventsEnabled() = 0;
 
   virtual std::vector<WmWindow*> GetAllRootWindows() = 0;
 
   virtual void RecordGestureAction(GestureActionType action) = 0;
   virtual void RecordUserMetricsAction(UserMetricsAction action) = 0;
   virtual void RecordTaskSwitchMetric(TaskSwitchSource source) = 0;
@@ skipping 82 matching lines @@
   static WmShell* instance_;
 
   base::ObserverList<LockStateObserver> lock_state_observers_;
 
   bool simulate_modal_window_open_for_testing_ = false;
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_SHELL_H_