ash: Move AppList support to ShelfWidget, expose ShelfWidget in WmShelf

ash/shelf/shelf_widget_unittest.cc

 // Copyright (c) 2013 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/common/shelf/shelf_widget.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/shelf/shelf_layout_manager.h"
@@ skipping 15 matching lines @@
 #include "ui/display/display.h"
 #include "ui/events/event_utils.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 namespace {
 
 ShelfWidget* GetShelfWidget() {
-  return test::AshTestBase::GetPrimaryShelf()->GetShelfWidgetForTesting();
+  return test::AshTestBase::GetPrimaryShelf()->shelf_widget();
 }
 
 ShelfLayoutManager* GetShelfLayoutManager() {
   return GetShelfWidget()->shelf_layout_manager();
 }
 
 }  // namespace
 
 using ShelfWidgetTest = test::AshMDTestBase;
 
@@ skipping 441 matching lines @@
 }
 
 TEST_P(ShelfWidgetTestWithDelegate, CreateLockedShelf) {
   // The auto hide state 'HIDDEN' is returned for any non-auto-hide behavior.
   TestCreateShelfWithInitialValues(SHELF_ALIGNMENT_BOTTOM_LOCKED,
                                    SHELF_AUTO_HIDE_BEHAVIOR_NEVER,
                                    SHELF_VISIBLE, SHELF_AUTO_HIDE_HIDDEN);
 }
 
 }  // namespace ash