mash: remove more shell/shelf WmWindow usage.

chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
index 8bbc8df797f0d402386f096c4c187d93a47ed680..e6c48d0248b52989f5e08cedf5119a58c960e9be 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc
@@ -1359,7 +1359,7 @@ void ChromeLauncherController::OnDisplayConfigurationChanged() {
   // Because it might be called by some operations, like crbug.com/627040
   // rotating screen.
   ash::WmShelf* shelf =
-      ash::WmShelf::ForWindow(ash::ShellPort::Get()->GetPrimaryRootWindow());
+      ash::WmShelf::ForWindow(ash::Shell::GetPrimaryRootWindow());
   if (shelf->alignment() != ash::SHELF_ALIGNMENT_BOTTOM_LOCKED)
     SetShelfBehaviorsFromPrefs();
 }