[mus+ash] Removes WmWindow from ash (app_list, frame, metrics, session, system, wallpaper)

ash/shared/immersive_fullscreen_controller.cc

 // Copyright 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/shared/immersive_fullscreen_controller.h"
 
 #include <set>
 
 #include "ash/shared/immersive_context.h"
 #include "ash/shared/immersive_focus_watcher.h"
@@ skipping 235 matching lines @@
     const ui::TouchEvent touch_event(event);
     OnTouchEvent(touch_event, location_in_screen);
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // views::WidgetObserver overrides:
 
 void ImmersiveFullscreenController::OnWidgetDestroying(views::Widget* widget) {
   EnableWindowObservers(false);
-  widget_window_ = nullptr;
 
   // Set |enabled_| to false such that any calls to MaybeStartReveal() and
   // MaybeEndReveal() have no effect.
   enabled_ = false;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // gfx::AnimationDelegate overrides:
 
 void ImmersiveFullscreenController::AnimationEnded(
@@ skipping 375 matching lines @@
           location.y() < hit_bounds_in_screen.y() &&
           location.x() >= hit_bounds_in_screen.x() &&
           location.x() < hit_bounds_in_screen.right());
 }
 
 gfx::Rect ImmersiveFullscreenController::GetDisplayBoundsInScreen() const {
   return ImmersiveContext::Get()->GetDisplayBoundsInScreen(widget_);
 }
 
 }  // namespace ash