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

ash/wm/immersive_context_ash.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/wm/immersive_context_ash.h"
 
 #include "ash/shared/immersive_fullscreen_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
 #include "ash/wm/resize_handle_window_targeter.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "base/logging.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 ImmersiveContextAsh::ImmersiveContextAsh() {}
 
 ImmersiveContextAsh::~ImmersiveContextAsh() {}
 
 void ImmersiveContextAsh::InstallResizeHandleWindowTargeter(
     ImmersiveFullscreenController* controller) {
-  aura::Window* window = controller->widget()->GetNativeWindow();
-  window->SetEventTargeter(
-      base::MakeUnique<ResizeHandleWindowTargeter>(window, controller));
+  wm::InstallResizeHandleWindowTargeterForWindow(
+      controller->widget()->GetNativeWindow(), controller);
 }
 
 void ImmersiveContextAsh::OnEnteringOrExitingImmersive(
     ImmersiveFullscreenController* controller,
     bool entering) {
   aura::Window* window = controller->widget()->GetNativeWindow();
   wm::WindowState* window_state = wm::GetWindowState(window);
   // Auto hide the shelf in immersive fullscreen instead of hiding it.
   window_state->set_hide_shelf_when_fullscreen(!entering);
   // Update the window's immersive mode state for the window manager.
@@ skipping 22 matching lines @@
 
 bool ImmersiveContextAsh::DoesAnyWindowHaveCapture() {
   return wm::GetCaptureWindow() != nullptr;
 }
 
 bool ImmersiveContextAsh::IsMouseEventsEnabled() {
   return ShellPort::Get()->IsMouseEventsEnabled();
 }
 
 }  // namespace ash