Revert "chromeos: Move files in //ash/common to //ash, part 1"

ash/system/overview/overview_button_tray.h

-// Copyright 2014 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_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
-#define ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
-
-#include "ash/ash_export.h"
-#include "ash/common/session/session_state_observer.h"
-#include "ash/common/shell_observer.h"
-#include "ash/system/tray/tray_background_view.h"
-#include "base/macros.h"
-
-namespace views {
-class ImageView;
-}
-
-namespace ash {
-
-// Status area tray for showing a toggle for Overview Mode. Overview Mode
-// is equivalent to WindowSelectorController being in selection mode.
-// This hosts a ShellObserver that listens for the activation of Maximize Mode
-// This tray will only be visible while in this state. This tray does not
-// provide any bubble view windows.
-class ASH_EXPORT OverviewButtonTray : public TrayBackgroundView,
-                                      public SessionStateObserver,
-                                      public ShellObserver {
- public:
-  explicit OverviewButtonTray(WmShelf* wm_shelf);
-  ~OverviewButtonTray() override;
-
-  // Updates the tray's visibility based on the LoginStatus and the current
-  // state of MaximizeMode
-  virtual void UpdateAfterLoginStatusChange(LoginStatus status);
-
-  // ActionableView:
-  bool PerformAction(const ui::Event& event) override;
-
-  // SessionStateObserver:
-  void SessionStateChanged(session_manager::SessionState state) override;
-
-  // ShellObserver:
-  void OnMaximizeModeStarted() override;
-  void OnMaximizeModeEnded() override;
-  void OnOverviewModeStarting() override;
-  void OnOverviewModeEnded() override;
-
-  // TrayBackgroundView:
-  void ClickedOutsideBubble() override;
-  base::string16 GetAccessibleNameForTray() override;
-  void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
-  void SetShelfAlignment(ShelfAlignment alignment) override;
-
- private:
-  friend class OverviewButtonTrayTest;
-
-  // Creates a new border for the icon. The padding is determined based on the
-  // alignment of the shelf.
-  void SetIconBorderForShelfAlignment();
-
-  // Sets the icon to visible if maximize mode is enabled and
-  // WindowSelectorController::CanSelect.
-  void UpdateIconVisibility();
-
-  // Weak pointer, will be parented by TrayContainer for its lifetime.
-  views::ImageView* icon_;
-
-  DISALLOW_COPY_AND_ASSIGN(OverviewButtonTray);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_