mus drag and drop: return the completed effect to the caller.

services/ui/ws/test_utils.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_TEST_UTILS_H_
 #define SERVICES_UI_WS_TEST_UTILS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 438 matching lines @@
                   uint32_t key_state,
                   const gfx::Point& position,
                   uint32_t effect_bitmask,
                   const OnDragOverCallback& callback) override;
   void OnDragLeave(uint32_t window) override;
   void OnCompleteDrop(uint32_t window,
                       uint32_t key_state,
                       const gfx::Point& position,
                       uint32_t effect_bitmask,
                       const OnCompleteDropCallback& callback) override;
+  void OnDragCompletedReturnValue(uint32_t window,
+                                  uint32_t action_taken) override;
   void OnDragDropDone() override;
   void OnChangeCompleted(uint32_t change_id, bool success) override;
   void RequestClose(uint32_t window_id) override;
   void GetWindowManager(
       mojo::AssociatedInterfaceRequest<mojom::WindowManager> internal) override;
 
   TestChangeTracker tracker_;
   mojo::Binding<mojom::WindowTreeClient> binding_;
   bool record_on_change_completed_ = false;
 
@@ skipping 189 matching lines @@
 ServerWindow* NewWindowInTree(WindowTree* tree, ClientWindowId* client_id);
 ServerWindow* NewWindowInTreeWithParent(WindowTree* tree,
                                         ServerWindow* parent,
                                         ClientWindowId* client_id);
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_TEST_UTILS_H_