[ash-md] Remove the number of animators used for the Shelf animations.

ash/common/wm/dock/docked_window_layout_manager.cc

 // Copyright (c) 2013 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/common/wm/dock/docked_window_layout_manager.h"
 
+#include "ash/animation/animation_change_type.h"
 #include "ash/common/shelf/shelf_background_animator.h"
 #include "ash/common/shelf/shelf_background_animator_observer.h"
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shelf/wm_shelf_observer.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
 #include "ash/common/wm/window_animation_types.h"
 #include "ash/common/wm/window_parenting_utils.h"
 #include "ash/common/wm/window_resizer.h"
 #include "ash/common/wm/window_state.h"
@@ skipping 31 matching lines @@
 class DockedBackgroundWidget : public views::Widget,
                                public WmShelfObserver,
                                public ShelfBackgroundAnimatorObserver {
  public:
   explicit DockedBackgroundWidget(DockedWindowLayoutManager* manager)
       : manager_(manager),
         alignment_(DOCKED_ALIGNMENT_NONE),
         background_animator_(SHELF_BACKGROUND_DEFAULT, nullptr),
         opaque_background_(ui::LAYER_SOLID_COLOR),
         visible_background_type_(manager_->shelf()->GetBackgroundType()),
-        visible_background_change_type_(BACKGROUND_CHANGE_IMMEDIATE) {
+        visible_background_change_type_(AnimationChangeType::IMMEDIATE) {
     manager_->shelf()->AddObserver(this);
     InitWidget(manager_->dock_container());
 
     background_animator_.AddObserver(this);
   }
 
   ~DockedBackgroundWidget() override {
     background_animator_.RemoveObserver(this);
     manager_->shelf()->RemoveObserver(this);
   }
 
   // Sets widget bounds and sizes opaque background layer to fill the widget.
   void SetBackgroundBounds(const gfx::Rect& bounds, DockedAlignment alignment) {
     SetBounds(bounds);
     opaque_background_.SetBounds(gfx::Rect(bounds.size()));
     alignment_ = alignment;
   }
 
  private:
   // views::Widget:
   void OnNativeWidgetVisibilityChanged(bool visible) override {
     views::Widget::OnNativeWidgetVisibilityChanged(visible);
     UpdateBackground();
   }
 
   // ShelfBackgroundAnimatorObserver:
-  void UpdateShelfOpaqueBackground(int alpha) override {
+  void UpdateShelfBackground(int alpha) override {
     const float kMaxAlpha = 255.0f;
     opaque_background_.SetOpacity(alpha / kMaxAlpha);
   }
 
   // WmShelfObserver:
-  void OnBackgroundTypeChanged(
-      ShelfBackgroundType background_type,
-      BackgroundAnimatorChangeType change_type) override {
+  void OnBackgroundTypeChanged(ShelfBackgroundType background_type,
+                               AnimationChangeType change_type) override {
     // Sets the background type. Starts an animation to transition to
     // |background_type| if the widget is visible. If the widget is not visible,
     // the animation is postponed till the widget becomes visible.
     visible_background_type_ = background_type;
     visible_background_change_type_ = change_type;
     if (IsVisible())
       UpdateBackground();
   }
 
   void InitWidget(WmWindow* parent) {
@@ skipping 20 matching lines @@
     // added to the container, and UpdateStacking only manages user windows, not
     // the background widget.
     parent->StackChildAtBottom(wm_window);
   }
 
   // Transitions to |visible_background_type_| if the widget is visible and to
   // SHELF_BACKGROUND_DEFAULT if it is not.
   void UpdateBackground() {
     ShelfBackgroundType background_type =
         IsVisible() ? visible_background_type_ : SHELF_BACKGROUND_DEFAULT;
-    BackgroundAnimatorChangeType change_type =
-        IsVisible() ? visible_background_change_type_
-                    : BACKGROUND_CHANGE_IMMEDIATE;
+    AnimationChangeType change_type = IsVisible()
+                                          ? visible_background_change_type_
+                                          : AnimationChangeType::IMMEDIATE;
     background_animator_.PaintBackground(background_type, change_type);
     SchedulePaintInRect(gfx::Rect(GetWindowBoundsInScreen().size()));
   }
 
   DockedWindowLayoutManager* manager_;
 
   DockedAlignment alignment_;
 
   // The animator for the background transitions.
   ShelfBackgroundAnimator background_animator_;
 
   // TODO(bruthig): Remove opaque_background_ (see https://crbug.com/621551).
   // Solid black background that can be made fully opaque.
   ui::Layer opaque_background_;
 
   // The background type to use when the widget is visible. When not visible,
   // the widget uses SHELF_BACKGROUND_DEFAULT.
   ShelfBackgroundType visible_background_type_;
 
   // Whether the widget should animate to |visible_background_type_|.
-  BackgroundAnimatorChangeType visible_background_change_type_;
+  AnimationChangeType visible_background_change_type_;
 
   DISALLOW_COPY_AND_ASSIGN(DockedBackgroundWidget);
 };
 
 namespace {
 
 // Returns true if a window is a popup or a transient child.
 bool IsPopupOrTransient(const WmWindow* window) {
   return (window->GetType() == ui::wm::WINDOW_TYPE_POPUP ||
           window->GetTransientParent());
@@ skipping 1151 matching lines @@
     const gfx::Rect& keyboard_bounds) {
   // This bounds change will have caused a change to the Shelf which does not
   // propagate automatically to this class, so manually recalculate bounds.
   Relayout();
   UpdateDockBounds(DockedWindowLayoutManagerObserver::KEYBOARD_BOUNDS_CHANGING);
 }
 
 void DockedWindowLayoutManager::OnKeyboardClosed() {}
 
 }  // namespace ash