Moves Shell::maximize_mode_controller() to WmShell

ash/frame/custom_frame_view_ash_unittest.cc

 // Copyright 2014 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/frame/custom_frame_view_ash.h"
 
 #include <memory>
 
 #include "ash/common/ash_layout_constants.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
@@ skipping 189 matching lines @@
 
 // The visibility of the size button is updated when maximize mode is toggled.
 // Verify that the layout of the HeaderView is updated for the size button's
 // new visibility.
 TEST_F(CustomFrameViewAshTest, HeaderViewNotifiedOfChildSizeChange) {
   TestWidgetConstraintsDelegate* delegate = new TestWidgetConstraintsDelegate;
   std::unique_ptr<views::Widget> widget(CreateWidget(delegate));
 
   const gfx::Rect initial =
       delegate->GetFrameCaptionButtonContainerViewBounds();
-  Shell::GetInstance()
-      ->maximize_mode_controller()
-      ->EnableMaximizeModeWindowManager(true);
+  WmShell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
+      true);
   delegate->EndFrameCaptionButtonContainerViewAnimations();
   const gfx::Rect maximize_mode_bounds =
       delegate->GetFrameCaptionButtonContainerViewBounds();
   EXPECT_GT(initial.width(), maximize_mode_bounds.width());
-  Shell::GetInstance()
-      ->maximize_mode_controller()
-      ->EnableMaximizeModeWindowManager(false);
+  WmShell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
+      false);
   delegate->EndFrameCaptionButtonContainerViewAnimations();
   const gfx::Rect after_restore =
       delegate->GetFrameCaptionButtonContainerViewBounds();
   EXPECT_EQ(initial, after_restore);
 }
 
 }  // namespace ash