chromeos: Rename ash::WmShelf to Shelf

ash/shelf/app_list_button_unittest.cc

 // Copyright 2017 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/shelf/app_list_button.h"
 
+#include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_view.h"
-#include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
 #include "chromeos/chromeos_switches.h"
 #include "ui/app_list/presenter/app_list.h"
 #include "ui/app_list/presenter/test/test_app_list_presenter.h"
 #include "ui/events/event_constants.h"
 
 namespace ash {
 namespace test {
@@ skipping 48 matching lines @@
 
   ui::GestureEvent long_press =
       CreateGestureEvent(ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS));
   SendGestureEvent(&long_press);
   RunAllPendingInMessageLoop();
   EXPECT_EQ(1u, test_app_list_presenter.voice_session_count());
 }
 
 }  // namespace test
 }  // namespace ash