Move VisibilityController to corewm.

ash/wm/visibility_controller.cc

-// Copyright (c) 2012 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/wm/visibility_controller.h"
-
-#include "ash/shell.h"
-#include "ash/wm/window_animations.h"
-#include "ash/wm/window_properties.h"
-#include "ui/aura/window.h"
-#include "ui/compositor/layer.h"
-
-namespace ash {
-namespace internal {
-
-namespace {
-
-bool ShouldAnimateWindow(aura::Window* window) {
-  return window->parent() && window->parent()->GetProperty(
-      internal::kChildWindowVisibilityChangesAnimatedKey);
-}
-
-}  // namespace
-
-VisibilityController::VisibilityController() {
-}
-
-VisibilityController::~VisibilityController() {
-}
-
-void VisibilityController::UpdateLayerVisibility(aura::Window* window,
-                                                 bool visible) {
-  bool animated = window->type() != aura::client::WINDOW_TYPE_CONTROL &&
-                  window->type() != aura::client::WINDOW_TYPE_UNKNOWN &&
-                  ShouldAnimateWindow(window);
-  animated = animated && AnimateOnChildWindowVisibilityChanged(window, visible);
-
-  if (!visible) {
-    // For window hiding animation, we want to check if the window is already
-    // animating, and not do SetVisible(false) if it is.
-    // TODO(vollick): remove this.
-    animated = animated || (window->layer()->GetAnimator()->
-        IsAnimatingProperty(ui::LayerAnimationElement::OPACITY) &&
-        window->layer()->GetTargetOpacity() == 0.0f);
-  }
-
-  // When a window is made visible, we always make its layer visible
-  // immediately. When a window is hidden, the layer must be left visible and
-  // only made not visible once the animation is complete.
-  if (!animated || visible)
-    window->layer()->SetVisible(visible);
-}
-
-}  // namespace internal
-
-SuspendChildWindowVisibilityAnimations::SuspendChildWindowVisibilityAnimations(
-    aura::Window* window)
-    : window_(window),
-      original_enabled_(window->GetProperty(
-          internal::kChildWindowVisibilityChangesAnimatedKey)) {
-  window_->ClearProperty(internal::kChildWindowVisibilityChangesAnimatedKey);
-}
-
-SuspendChildWindowVisibilityAnimations::
-    ~SuspendChildWindowVisibilityAnimations() {
-  if (original_enabled_) {
-    window_->SetProperty(internal::kChildWindowVisibilityChangesAnimatedKey,
-                         true);
-  } else {
-    window_->ClearProperty(internal::kChildWindowVisibilityChangesAnimatedKey);
-  }
-}
-
-void SetChildWindowVisibilityChangesAnimated(aura::Window* window) {
-  window->SetProperty(internal::kChildWindowVisibilityChangesAnimatedKey, true);
-}
-
-}  // namespace ash