Revert of mash: Convert TrayBackgroundView to wm common types

ash/system/tray/tray_background_view.h

Index: ash/system/tray/tray_background_view.h
diff --git a/ash/system/tray/tray_background_view.h b/ash/system/tray/tray_background_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..92fd9b21f9df28a0c43451e35e651a81c42edf5d
--- /dev/null
+++ b/ash/system/tray/tray_background_view.h
@@ -0,0 +1,186 @@
+// 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.
+
+#ifndef ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+#define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
+
+#include <memory>
+
+#include "ash/ash_export.h"
+#include "ash/common/shelf/shelf_types.h"
+#include "ash/common/system/tray/actionable_view.h"
+#include "ash/common/wm/background_animator.h"
+#include "base/macros.h"
+#include "ui/compositor/layer_animation_observer.h"
+#include "ui/views/bubble/tray_bubble_view.h"
+
+namespace ash {
+class ShelfLayoutManager;
+class StatusAreaWidget;
+class TrayEventFilter;
+class TrayBackground;
+class WmShelf;
+
+// Base class for children of StatusAreaWidget: SystemTray, WebNotificationTray,
+// LogoutButtonTray, OverviewButtonTray.
+// This class handles setting and animating the background when the Launcher
+// his shown/hidden. It also inherits from ActionableView so that the tray
+// items can override PerformAction when clicked on.
+class ASH_EXPORT TrayBackgroundView : public ActionableView,
+                                      public BackgroundAnimatorDelegate,
+                                      public ui::ImplicitAnimationObserver {
+ public:
+  static const char kViewClassName[];
+
+  // Base class for tray containers. Sets the border and layout. The container
+  // auto-resizes the widget when necessary.
+  class TrayContainer : public views::View {
+   public:
+    explicit TrayContainer(ShelfAlignment alignment);
+    ~TrayContainer() override {}
+
+    void SetAlignment(ShelfAlignment alignment);
+
+    void set_size(const gfx::Size& size) { size_ = size; }
+
+    // views::View:
+    gfx::Size GetPreferredSize() const override;
+
+   protected:
+    // views::View:
+    void ChildPreferredSizeChanged(views::View* child) override;
+    void ChildVisibilityChanged(View* child) override;
+    void ViewHierarchyChanged(
+        const ViewHierarchyChangedDetails& details) override;
+
+   private:
+    void UpdateLayout();
+
+    ShelfAlignment alignment_;
+    gfx::Size size_;
+
+    DISALLOW_COPY_AND_ASSIGN(TrayContainer);
+  };
+
+  explicit TrayBackgroundView(StatusAreaWidget* status_area_widget);
+  ~TrayBackgroundView() override;
+
+  // Called after the tray has been added to the widget containing it.
+  virtual void Initialize();
+
+  // Initializes animations for the bubble.
+  static void InitializeBubbleAnimations(views::Widget* bubble_widget);
+
+  // views::View:
+  void SetVisible(bool visible) override;
+  const char* GetClassName() const override;
+  void ChildPreferredSizeChanged(views::View* child) override;
+  void GetAccessibleState(ui::AXViewState* state) override;
+  void AboutToRequestFocusFromTabTraversal(bool reverse) override;
+
+  // ActionableView:
+  bool PerformAction(const ui::Event& event) override;
+  gfx::Rect GetFocusBounds() override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+
+  // BackgroundAnimatorDelegate:
+  void UpdateBackground(int alpha) override;
+
+  // Called whenever the shelf alignment changes.
+  virtual void SetShelfAlignment(ShelfAlignment alignment);
+
+  // Called when the anchor (tray or bubble) may have moved or changed.
+  virtual void AnchorUpdated() {}
+
+  // Called from GetAccessibleState, must return a valid accessible name.
+  virtual base::string16 GetAccessibleNameForTray() = 0;
+
+  // Called when the bubble is resized.
+  virtual void BubbleResized(const views::TrayBubbleView* bubble_view) {}
+
+  // Hides the bubble associated with |bubble_view|. Called when the widget
+  // is closed.
+  virtual void HideBubbleWithView(const views::TrayBubbleView* bubble_view) = 0;
+
+  // Called by the bubble wrapper when a click event occurs outside the bubble.
+  // May close the bubble.
+  virtual void ClickedOutsideBubble() = 0;
+
+  // Sets |contents| as a child.
+  void SetContents(views::View* contents);
+
+  // Creates and sets contents background to |background_|.
+  void SetContentsBackground();
+
+  // Returns the anchor rect for the bubble.
+  gfx::Rect GetBubbleAnchorRect(
+      views::Widget* anchor_widget,
+      views::TrayBubbleView::AnchorType anchor_type,
+      views::TrayBubbleView::AnchorAlignment anchor_alignment) const;
+
+  // Returns the bubble anchor alignment based on |shelf_alignment_|.
+  views::TrayBubbleView::AnchorAlignment GetAnchorAlignment() const;
+
+  // Forces the background to be drawn active if set to true.
+  void SetDrawBackgroundAsActive(bool visible);
+
+  // Returns true when the the background was overridden to be drawn as active.
+  bool draw_background_as_active() const {return draw_background_as_active_; }
+
+  StatusAreaWidget* status_area_widget() {
+    return status_area_widget_;
+  }
+  const StatusAreaWidget* status_area_widget() const {
+    return status_area_widget_;
+  }
+  TrayContainer* tray_container() const { return tray_container_; }
+  ShelfAlignment shelf_alignment() const { return shelf_alignment_; }
+  TrayEventFilter* tray_event_filter() { return tray_event_filter_.get(); }
+
+  WmShelf* GetShelf();
+
+  // Updates the arrow visibility based on the launcher visibility.
+  void UpdateBubbleViewArrow(views::TrayBubbleView* bubble_view);
+
+ private:
+  class TrayWidgetObserver;
+
+  // Called from Initialize after all status area trays have been created.
+  // Sets the border based on the position of the view.
+  void SetTrayBorder();
+
+  // ui::ImplicitAnimationObserver:
+  void OnImplicitAnimationsCompleted() override;
+  bool RequiresNotificationWhenAnimatorDestroyed() const override;
+
+  // Applies transformations to the |layer()| to animate the view when
+  // SetVisible(false) is called.
+  void HideTransformation();
+
+  // Unowned pointer to parent widget.
+  StatusAreaWidget* status_area_widget_;
+
+  // Convenience pointer to the contents view.
+  TrayContainer* tray_container_;
+
+  // Shelf alignment.
+  // TODO(jamescook): Don't cache this, get it from WmShelf.
+  ShelfAlignment shelf_alignment_;
+
+  // Owned by the view passed to SetContents().
+  TrayBackground* background_;
+
+  // This variable stores the activation override which will tint the background
+  // differently if set to true.
+  bool draw_background_as_active_;
+
+  std::unique_ptr<TrayWidgetObserver> widget_observer_;
+  std::unique_ptr<TrayEventFilter> tray_event_filter_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_