mash: Migrate wallpaper controllers to ash/common.

ash/mus/test/wm_test_helper.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 "ash/mus/test/wm_test_helper.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/test/material_design_controller_test_api.h"
 #include "ash/mus/root_window_controller.h"
 #include "ash/mus/test/wm_test_screen.h"
@@ skipping 10 matching lines @@
 
 namespace ash {
 namespace mus {
 
 WmTestHelper::WmTestHelper() {}
 
 WmTestHelper::~WmTestHelper() {
   // Needs to be destroyed before material design.
   window_manager_app_.reset();
 
+  base::RunLoop().RunUntilIdle();
+  blocking_pool_owner_.reset();
+  base::RunLoop().RunUntilIdle();
+
   ash::test::MaterialDesignControllerTestAPI::Uninitialize();
   ui::test::MaterialDesignControllerTestAPI::Uninitialize();
 }
 
 void WmTestHelper::Init() {
   ui::MaterialDesignController::Initialize();
   ash::MaterialDesignController::Initialize();
 
   window_manager_app_ = base::MakeUnique<WindowManagerApplication>();
 
   message_loop_.reset(new base::MessageLoopForUI());
+
+  const size_t kMaxNumberThreads = 3u;  // Matches that of content.
+  const char kThreadNamePrefix[] = "MashBlockingForTesting";
+  blocking_pool_owner_ = base::MakeUnique<base::SequencedWorkerPoolOwner>(
+      kMaxNumberThreads, kThreadNamePrefix);
+
   window_manager_app_->window_manager_.reset(new WindowManager(nullptr));
   screen_ = new WmTestScreen;
   window_manager_app_->window_manager_->screen_.reset(screen_);
 
   // Need an id other than kInvalidDisplayID so the Display is considered valid.
   display::Display display(1);
   const gfx::Rect display_bounds(0, 0, 800, 600);
   display.set_bounds(display_bounds);
   // Offset the height slightly to give a different work area. -20 is arbitrary,
   // it could be anything.
   const gfx::Rect work_area(0, 0, display_bounds.width(),
                             display_bounds.height() - 20);
   display.set_work_area(work_area);
   window_tree_client_setup_.InitForWindowManager(
       window_manager_app_->window_manager_.get(),
       window_manager_app_->window_manager_.get(), display);
 
   window_manager_app_->InitWindowManager(
-      window_tree_client_setup_.OwnWindowTreeClient());
+      window_tree_client_setup_.OwnWindowTreeClient(),
+      blocking_pool_owner_->pool());
   ui::WindowTreeClient* window_tree_client =
       window_manager_app_->window_manager()->window_tree_client();
 
   screen_->display_list()->AddDisplay(display,
                                       display::DisplayList::Type::PRIMARY);
 
   ui::WindowTreeClientPrivate(window_tree_client)
       .CallWmNewDisplayAdded(display);
 }
 
 }  // namespace mus
 }  // namespace ash