mash: remove more shell/shelf WmWindow usage.

ash/system/palette/palette_utils.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/palette/palette_utils.h"
 
 #include "ash/ash_switches.h"
 #include "ash/palette_delegate.h"
 #include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
-#include "ash/shell_port.h"
 #include "ash/system/palette/palette_tray.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/wm_window.h"
 #include "base/command_line.h"
 #include "ui/display/display.h"
 #include "ui/events/devices/input_device_manager.h"
 #include "ui/events/devices/touchscreen_device.h"
 #include "ui/gfx/geometry/point.h"
 
 namespace ash {
@@ skipping 26 matching lines @@
 
 bool ShouldShowPalette() {
   return HasStylusInput() &&
          (display::Display::HasInternalDisplay() ||
           IsPaletteEnabledOnEveryDisplay()) &&
          Shell::Get()->palette_delegate() &&
          Shell::Get()->palette_delegate()->ShouldShowPalette();
 }
 
 bool PaletteContainsPointInScreen(const gfx::Point& point) {
-  for (WmWindow* window : ShellPort::Get()->GetAllRootWindows()) {
+  for (aura::Window* window : Shell::GetAllRootWindows()) {
     PaletteTray* palette_tray =
         WmShelf::ForWindow(window)->GetStatusAreaWidget()->palette_tray();
     if (palette_tray && palette_tray->ContainsPointInScreen(point))
       return true;
   }
 
   return false;
 }
 
 }  // namespace palette_utils
 }  // namespace ash