MacViews: Put wm window animation calls behind an interface.

chrome/browser/chromeos/login/ui/login_display_host_impl.cc

Index: chrome/browser/chromeos/login/ui/login_display_host_impl.cc
diff --git a/chrome/browser/chromeos/login/ui/login_display_host_impl.cc b/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
index 1f2eb3d5acdbef0d584322b7ae7fbffd42adf6f8..4d7179f9c6ee8420c1f7d1863217beb56d5d39b0 100644
--- a/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
+++ b/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
@@ -93,7 +93,6 @@
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
-#include "ui/wm/core/window_animations.h"
 #include "url/gurl.h"
 
 #if defined(USE_ATHENA)
@@ -1089,12 +1088,10 @@ void LoginDisplayHostImpl::InitLoginWindowAndView() {
   if (login_view_->webui_visible())
     OnLoginPromptVisible();
 
-  wm::SetWindowVisibilityAnimationDuration(
-      login_window_->GetNativeView(),
+  login_window_->GetVisibilityAnimation()->SetDuration(
       base::TimeDelta::FromMilliseconds(kLoginFadeoutTransitionDurationMs));
-  wm::SetWindowVisibilityAnimationTransition(
-      login_window_->GetNativeView(),
-      wm::ANIMATE_HIDE);
+  login_window_->GetVisibilityAnimation()->SetTransition(
+      views::Widget::VisibilityAnimation::ANIMATE_HIDE);
 
   login_window_->AddRemovalsObserver(this);
   login_window_->SetContentsView(login_view_);