Mus+Ash: propagate Surface ID to parents

services/ui/public/cpp/tests/test_window_tree.cc

 // 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.
 
 #include "services/ui/public/cpp/tests/test_window_tree.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace ui {
 
@@ skipping 168 matching lines @@
 
 void TestWindowTree::CancelDragDrop(uint32_t window_id) {}
 
 void TestWindowTree::PerformWindowMove(uint32_t change_id,
                                        uint32_t window_id,
                                        mojom::MoveLoopSource source,
                                        const gfx::Point& cursor_location) {}
 
 void TestWindowTree::CancelWindowMove(uint32_t window_id) {}
 
+void TestWindowTree::OnWindowSurfaceDetached(
+    uint32_t window_id,
+    const cc::SurfaceSequence& sequence) {}
+
 }  // namespace ui