Add {Lock,Unlock,Show,Hide}Cursor() to the window manager mojom.

ash/shell_port.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_SHELL_PORT_H_
 #define ASH_SHELL_PORT_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/metrics/gesture_action_type.h"
 #include "ash/metrics/user_metrics_action.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/observer_list.h"
+#include "base/optional.h"
+#include "ui/base/cursor/cursor_data.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/compositor/layer_type.h"
 #include "ui/wm/public/activation_change_observer.h"
 #include "ui/wm/public/window_types.h"
 
 namespace display {
 class Display;
 class ManagedDisplayInfo;
 class NativeDisplayDelegate;
 }
@@ skipping 99 matching lines @@
   void OnModalWindowRemoved(aura::Window* 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;
   }
 
   // See aura::client::CursorClient for details on these.
   virtual void LockCursor() = 0;
   virtual void UnlockCursor() = 0;
+  virtual void ShowCursor() = 0;
+  virtual void HideCursor() = 0;
+  virtual void SetGlobalOverrideCursor(
+      base::Optional<ui::CursorData> cursor) = 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;
 
   // Shows the context menu for the wallpaper or shelf at |location_in_screen|.
   void ShowContextMenu(const gfx::Point& location_in_screen,
@@ skipping 91 matching lines @@
   static ShellPort* instance_;
 
   base::ObserverList<LockStateObserver> lock_state_observers_;
 
   bool simulate_modal_window_open_for_testing_ = false;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_PORT_H_