mus: Keep track of the drag cursor during DnD operations.

services/ui/ws/event_dispatcher_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 SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_
 #define SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "services/ui/common/types.h"
@@ skipping 28 matching lines @@
   virtual ServerWindow* GetFocusedWindowForEventDispatcher() = 0;
 
   // Called when capture should be set on the native display. |window| is the
   // window capture is being set on.
   virtual void SetNativeCapture(ServerWindow* window) = 0;
 
   // Called when the native display is having capture released. There is no
   // longer a ServerWindow holding capture.
   virtual void ReleaseNativeCapture() = 0;
 
+  // Called when EventDispatcher has a new value for the cursor and our
+  // delegate should perform the native updates.
+  virtual void UpdateNativeCursorFromDispatcher() = 0;
+
   // Called when |window| has lost capture. The native display may still be
   // holding capture. The delegate should not change native display capture.
   // ReleaseNativeCapture() is invoked if appropriate.
   virtual void OnCaptureChanged(ServerWindow* new_capture,
                                 ServerWindow* old_capture) = 0;
 
   virtual void OnMouseCursorLocationChanged(const gfx::Point& point) = 0;
 
   // Dispatches an event to the specific client.
   virtual void DispatchInputEventToWindow(ServerWindow* target,
@@ skipping 17 matching lines @@
   virtual void OnEventTargetNotFound(const ui::Event& event) = 0;
 
  protected:
   virtual ~EventDispatcherDelegate() {}
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_EVENT_DISPATCHER_DELEGATE_H_