Removes aura dependencies from WindowPositioner

ash/system/toast/toast_overlay.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/toast/toast_overlay.h"
 
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shell.h"
@@ skipping 171 matching lines @@
   params.parent = Shell::GetContainer(Shell::GetTargetRootWindow(),
                                       kShellWindowId_SystemModalContainer);
   overlay_widget_.reset(new views::Widget);
   overlay_widget_->Init(params);
   overlay_widget_->SetVisibilityChangedAnimationsEnabled(true);
   overlay_widget_->SetContentsView(overlay_view_.get());
   overlay_widget_->SetBounds(CalculateOverlayBounds());
   overlay_widget_->GetNativeView()->SetName("ToastOverlay");
 
   gfx::NativeWindow native_view = overlay_widget_->GetNativeView();
-  wm::SetWindowVisibilityAnimationType(
-      native_view, wm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
-  wm::SetWindowVisibilityAnimationDuration(
+  ::wm::SetWindowVisibilityAnimationType(
+      native_view, ::wm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
+  ::wm::SetWindowVisibilityAnimationDuration(
       native_view,
       base::TimeDelta::FromMilliseconds(kSlideAnimationDurationMs));
 }
 
 ToastOverlay::~ToastOverlay() {
   overlay_widget_->Close();
 }
 
 void ToastOverlay::Show(bool visible) {
   if (overlay_widget_->GetLayer()->GetTargetVisibility() == visible)
@@ skipping 37 matching lines @@
 
 views::Widget* ToastOverlay::widget_for_testing() {
   return overlay_widget_.get();
 }
 
 void ToastOverlay::ClickDismissButtonForTesting(const ui::Event& event) {
   overlay_view_->button()->NotifyClick(event);
 }
 
 }  // namespace ash