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

ui/aura/mus/window_manager_delegate.h

 // Copyright 2015 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 UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 #define UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 42 matching lines @@
   virtual void AddAccelerators(
       std::vector<ui::mojom::WmAcceleratorPtr> accelerators,
       const base::Callback<void(bool)>& callback) = 0;
   virtual void RemoveAccelerator(uint32_t id) = 0;
   virtual void AddActivationParent(Window* window) = 0;
   virtual void RemoveActivationParent(Window* window) = 0;
   virtual void ActivateNextWindow() = 0;
   virtual void SetExtendedHitArea(Window* window,
                                   const gfx::Insets& hit_area) = 0;
 
+  // Queues changes to the cursor instead of applying them instantly. Queued
+  // changes will be executed on UnlockCursor().
+  virtual void LockCursor() = 0;
+
+  // Executes queued changes.
+  virtual void UnlockCursor() = 0;
+
+  // Globally shows or hides the cursor.
+  virtual void SetCursorVisible(bool visible) = 0;
+
+  // Sets a cursor which is used instead of the per window cursors. Pass a
+  // nullopt in |cursor| to clear the override.
+  virtual void SetGlobalOverrideCursor(
+      base::Optional<ui::CursorData> cursor) = 0;
+
   // Requests the client embedded in |window| to close the window. Only
   // applicable to top-level windows. If a client is not embedded in |window|,
   // this does nothing.
   virtual void RequestClose(Window* window) = 0;
 
   // Blocks until the initial displays have been received, or if displays are
   // not automatically created until the connection to mus has been
   // established.
   virtual bool WaitForInitialDisplays() = 0;
 
@@ skipping 122 matching lines @@
   // window.
   virtual void OnWmDeactivateWindow(Window* window) = 0;
 
  protected:
   virtual ~WindowManagerDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_