Remove SurfaceSequence from mus client code.

ui/aura/test/mus/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 "ui/aura/test/mus/test_window_tree.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace aura {
 
@@ skipping 145 matching lines @@
                                       float opacity) {
   OnChangeReceived(change_id);
 }
 
 void TestWindowTree::AttachCompositorFrameSink(
     uint32_t window_id,
     ui::mojom::CompositorFrameSinkType type,
     mojo::InterfaceRequest<cc::mojom::MojoCompositorFrameSink> surface,
     cc::mojom::MojoCompositorFrameSinkClientPtr client) {}
 
-void TestWindowTree::OnWindowSurfaceDetached(
-    uint32_t window_id,
-    const cc::SurfaceSequence& sequence) {}
-
 void TestWindowTree::AddWindow(uint32_t change_id,
                                uint32_t parent,
                                uint32_t child) {
   OnChangeReceived(change_id);
 }
 
 void TestWindowTree::RemoveWindowFromParent(uint32_t change_id,
                                             uint32_t window_id) {
   OnChangeReceived(change_id);
 }
@@ skipping 95 matching lines @@
 void TestWindowTree::PerformWindowMove(uint32_t change_id,
                                        uint32_t window_id,
                                        ui::mojom::MoveLoopSource source,
                                        const gfx::Point& cursor_location) {
   OnChangeReceived(change_id);
 }
 
 void TestWindowTree::CancelWindowMove(uint32_t window_id) {}
 
 }  // namespace aura