Move even more from WmShell to Shell

ash/system/chromeos/power/tablet_power_button_controller_unittest.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/system/chromeos/power/tablet_power_button_controller.h"
 
 #include <memory>
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/session/session_controller.h"
@@ skipping 86 matching lines @@
     GetSessionControllerClient()->UnlockScreen();
   }
 
   void Initialize(LoginStatus status) {
     lock_state_controller_->OnLoginStateChanged(status);
     SetUserLoggedIn(status != LoginStatus::NOT_LOGGED_IN);
     lock_state_controller_->OnLockStateChanged(false);
   }
 
   void EnableMaximizeMode(bool enabled) {
-    WmShell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
+    Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
         enabled);
   }
 
   bool GetLockedState() {
     // LockScreen is an async mojo call. Spin message loop to ensure it is
     // delivered.
     SessionController* const session_controller =
         WmShell::Get()->session_controller();
     session_controller->FlushMojoForTest();
     return session_controller->IsScreenLocked();
@@ skipping 360 matching lines @@
   // Test that after another long duration, backlights should be forced off.
   tick_clock_->Advance(base::TimeDelta::FromMilliseconds(800));
   power_manager_client_->SendPowerButtonEvent(true, tick_clock_->NowTicks());
   power_manager_client_->SendPowerButtonEvent(false, tick_clock_->NowTicks());
   power_manager_client_->SendBrightnessChanged(0, false);
   EXPECT_TRUE(GetBacklightsForcedOff());
 }
 
 }  // namespace test
 }  // namespace ash