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

ash/wm/dock/docked_window_resizer_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/wm/dock/docked_window_resizer.h"
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/ash_switches.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shelf/shelf_widget.h"
@@ skipping 1353 matching lines @@
   // Detach and drag down to shelf.
   ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
   DragMove(-40, 0);
   // Alignment is set to "NONE" when drag starts.
   EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
   // Release the mouse and the window should be no longer attached to the edge.
   DragEnd();
   EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
 
   // Drag down almost to shelf. A panel will snap, a regular window won't.
-  ShelfWidget* shelf = GetPrimaryShelf()->GetShelfWidgetForTesting();
-  const int shelf_y = shelf->GetWindowBoundsInScreen().y();
+  const int shelf_y =
+      GetPrimaryShelf()->shelf_widget()->GetWindowBoundsInScreen().y();
   const int kDistanceFromShelf = 10;
   ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
   DragMove(0, -kDistanceFromShelf + shelf_y - w1->bounds().bottom());
   DragEnd();
   if (test_panels()) {
     // The panel should be touching the shelf and attached.
     EXPECT_EQ(shelf_y, w1->bounds().bottom());
     EXPECT_TRUE(wm::GetWindowState(w1.get())->panel_attached());
   } else {
     // The window should not be touching the shelf.
@@ skipping 184 matching lines @@
   EXPECT_TRUE(window_state->IsMaximized());
 }
 
 // Tests run twice - on both panels and normal windows
 INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                         DockedWindowResizerTest,
                         testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                         ui::wm::WINDOW_TYPE_PANEL));
 
 }  // namespace ash