Move even more from WmShell to Shell

components/exo/wm_helper_ash.cc

Index: components/exo/wm_helper_ash.cc
diff --git a/components/exo/wm_helper_ash.cc b/components/exo/wm_helper_ash.cc
index 4fefebd5f2e2e73dd3ef5ddc0e3cdbe5e74f9f83..e402b56083bb3418c067b6b51e6a15976c8bbaa7 100644
--- a/components/exo/wm_helper_ash.cc
+++ b/components/exo/wm_helper_ash.cc
@@ -94,7 +94,7 @@ void WMHelperAsh::RemovePostTargetHandler(ui::EventHandler* handler) {
 }
 
 bool WMHelperAsh::IsMaximizeModeWindowManagerEnabled() const {
-  return ash::WmShell::Get()
+  return ash::Shell::Get()
       ->maximize_mode_controller()
       ->IsMaximizeModeWindowManagerEnabled();
 }