Update the layout mode first when exiting tablet mode

ash/common/wm/maximize_mode/maximize_mode_controller.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 <utility>
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_window_manager.h"
@@ skipping 128 matching lines @@
     // TODO(jonross): Move the maximize mode notifications from ShellObserver
     // to MaximizeModeController::Observer
     shell->RecordUserMetricsAction(UMA_MAXIMIZE_MODE_ENABLED);
     shell->OnMaximizeModeStarted();
 
     observers_.ForAllPtrs([](mojom::TouchViewObserver* observer) {
       observer->OnTouchViewToggled(true);
     });
 
   } else {
+    shell->OnMaximizeModeEnding();
     maximize_mode_window_manager_.reset();
     shell->RecordUserMetricsAction(UMA_MAXIMIZE_MODE_DISABLED);
     shell->OnMaximizeModeEnded();
 
     observers_.ForAllPtrs([](mojom::TouchViewObserver* observer) {
       observer->OnTouchViewToggled(false);
     });
   }
 }
 
@@ skipping 258 matching lines @@
   return elapsed_time.InSeconds() <= kLidRecentlyOpenedDurationSeconds;
 }
 
 void MaximizeModeController::SetTickClockForTest(
     std::unique_ptr<base::TickClock> tick_clock) {
   DCHECK(tick_clock_);
   tick_clock_ = std::move(tick_clock);
 }
 
 }  // namespace ash