Wires up drag/drop for aura-mus

services/ui/ws/drag_controller.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 SERVICES_UI_WS_DRAG_CONTROLLER_H_
 #define SERVICES_UI_WS_DRAG_CONTROLLER_H_
 
 #include <map>
 #include <set>
 
@@ skipping 75 matching lines @@
   // that the drag source allows.
   ui::mojom::Cursor CursorForEffectBitmask(DropEffectBitmask bitmask);
 
   // Ensure that |window| has an entry in |window_state_| and that we're an
   // observer.
   void EnsureWindowObserved(ServerWindow* window);
 
   void QueueOperation(ServerWindow* window,
                       OperationType type,
                       uint32_t event_flags,
-                      gfx::Point screen_position);
+                      const gfx::Point& screen_position);
   void DispatchOperation(ServerWindow* window, WindowState* state);
   void OnRespondToOperation(ServerWindow* window);
 
   // Callback methods.
   void OnDragStatusCompleted(const WindowId& id, DropEffectBitmask bitmask);
   void OnDragDropCompleted(const WindowId& id, DropEffect action);
 
   // ServerWindowObserver:
   void OnWindowDestroying(ServerWindow* window) override;
 
@@ skipping 37 matching lines @@
 
   base::WeakPtrFactory<DragController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DragController);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_DRAG_CONTROLLER_H_