Moves Shell::maximize_mode_controller() to WmShell

ash/wm/maximize_mode/maximize_mode_controller_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/common/wm/maximize_mode/maximize_mode_controller.h"
 
 #include <math.h>
 #include <utility>
 #include <vector>
 
@@ skipping 72 matching lines @@
     test::DisplayManagerTestApi().SetFirstDisplayAsInternalDisplay();
   }
 
   void TearDown() override {
     chromeos::AccelerometerReader::GetInstance()->AddObserver(
         maximize_mode_controller());
     test::AshTestBase::TearDown();
   }
 
   MaximizeModeController* maximize_mode_controller() {
-    return Shell::GetInstance()->maximize_mode_controller();
+    return WmShell::Get()->maximize_mode_controller();
   }
 
   void TriggerLidUpdate(const gfx::Vector3dF& lid) {
     scoped_refptr<chromeos::AccelerometerUpdate> update(
         new chromeos::AccelerometerUpdate());
     update->Set(chromeos::ACCELEROMETER_SOURCE_SCREEN, lid.x(), lid.y(),
                 lid.z());
     maximize_mode_controller()->OnAccelerometerUpdated(update);
   }
 
@@ skipping 423 matching lines @@
 // accelerometer updates which would normally cause it to exit do not.
 TEST_F(MaximizeModeControllerSwitchesTest, IgnoreHingeAngles) {
   maximize_mode_controller()->EnableMaximizeModeWindowManager(true);
 
   // Would normally trigger an exit from maximize mode.
   OpenLidToAngle(90.0f);
   EXPECT_TRUE(IsMaximizeModeStarted());
 }
 
 }  // namespace ash