Changes ownership of WindowTreeClient

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

 // 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.
 
 #include "services/ui/public/cpp/tests/test_window_tree_client_setup.h"
 
 #include "services/ui/public/cpp/tests/test_window_tree.h"
 #include "services/ui/public/cpp/tests/window_tree_client_private.h"
 #include "services/ui/public/cpp/window_tree_client.h"
 #include "ui/display/display.h"
 
 namespace ui {
 
 TestWindowTreeClientSetup::TestWindowTreeClientSetup() {}
 
-TestWindowTreeClientSetup::~TestWindowTreeClientSetup() {
-  std::unique_ptr<WindowTreeClient> window_tree_client =
-      std::move(window_tree_client_);
-  if (window_tree_client)
-    window_tree_client->RemoveObserver(this);
-}
+TestWindowTreeClientSetup::~TestWindowTreeClientSetup() {}
 
 void TestWindowTreeClientSetup::Init(
     WindowTreeClientDelegate* window_tree_delegate) {
   CommonInit(window_tree_delegate, nullptr);
   WindowTreeClientPrivate(window_tree_client_.get())
       .OnEmbed(window_tree_.get());
 }
 
 void TestWindowTreeClientSetup::InitForWindowManager(
     WindowTreeClientDelegate* window_tree_delegate,
     WindowManagerDelegate* window_manager_delegate,
     const display::Display& display) {
   CommonInit(window_tree_delegate, window_manager_delegate);
   WindowTreeClientPrivate(window_tree_client_.get())
       .SetTreeAndClientId(window_tree_.get(), 1);
 }
 
+std::unique_ptr<WindowTreeClient>
+TestWindowTreeClientSetup::OwnWindowTreeClient() {
+  DCHECK(window_tree_client_);
+  return std::move(window_tree_client_);
+}
+
 WindowTreeClient* TestWindowTreeClientSetup::window_tree_client() {
   return window_tree_client_.get();
 }
 
 void TestWindowTreeClientSetup::CommonInit(
     WindowTreeClientDelegate* window_tree_delegate,
     WindowManagerDelegate* window_manager_delegate) {
   window_tree_.reset(new TestWindowTree);
   window_tree_client_.reset(new WindowTreeClient(
       window_tree_delegate, window_manager_delegate, nullptr));
-  static_cast<WindowTreeClient*>(window_tree_client_.get())
-      ->AddObserver(this);
-}
-
-void TestWindowTreeClientSetup::OnDidDestroyClient(
-    ui::WindowTreeClient* client) {
-  // See comment in header as to why we do this.
-  window_tree_client_.release();
 }
 
 }  // namespace ui