Added HALF, FULLSCREEN_ALL_APPS, and FULLSCREEN_SEARCH.

ash/app_list/app_list_presenter_delegate.h

 // 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_APP_LIST_APP_LIST_PRESENTER_DELEGATE_H_
 #define ASH_APP_LIST_APP_LIST_PRESENTER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include "ash/ash_export.h"
+#include "ash/shelf/shelf_observer.h"
 #include "ash/shell_observer.h"
 #include "base/macros.h"
 #include "ui/app_list/presenter/app_list_presenter_delegate.h"
 #include "ui/events/event_handler.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 
 namespace app_list {
 class AppListPresenterImpl;
 class AppListView;
 class AppListViewDelegateFactory;
 }
 
 namespace ui {
 class LocatedEvent;
 }
 
 namespace ash {
 
 // Non-Mus+ash implementation of AppListPresenterDelegate.
 // Responsible for laying out the app list UI as well as updating the Shelf
 // launch icon as the state of the app list changes. Listens to shell events
 // and touches/mouse clicks outside the app list to auto dismiss the UI or
 // update its layout as necessary.
 class ASH_EXPORT AppListPresenterDelegate
     : public app_list::AppListPresenterDelegate,
       public ui::EventHandler,
       public keyboard::KeyboardControllerObserver,
-      public ShellObserver {
+      public ShellObserver,
+      public ShelfObserver {

[xiyuan, 2017/06/13 21:38:58]

Is ShelfObserver used?

[newcomer, 2017/06/13 22:22:47]

no, thanks!

  public:
   AppListPresenterDelegate(
       app_list::AppListPresenterImpl* presenter,
       app_list::AppListViewDelegateFactory* view_delegate_factory);
   ~AppListPresenterDelegate() override;
 
   // app_list::AppListPresenterDelegate:
   app_list::AppListViewDelegate* GetViewDelegate() override;
   void Init(app_list::AppListView* view,
             int64_t display_id,
             int current_apps_page) override;
   void OnShown(int64_t display_id) override;
   void OnDismissed() override;
   void UpdateBounds() override;
   gfx::Vector2d GetVisibilityAnimationOffset(
       aura::Window* root_window) override;
+  // Whether the maximize mode controller is active.
+  bool IsMaximizeModeActive() const;

[xiyuan, 2017/06/13 21:38:58]

This and IsSideShelf() can go into cc file in anonymous namespace.

[newcomer, 2017/06/13 22:22:47]

Done.

+  // Whether the shelf is oriented on the side, not on the bottom.
+  bool IsSideShelf() const;
 
  private:
   void ProcessLocatedEvent(ui::LocatedEvent* event);
 
   // ui::EventHandler overrides:
   void OnMouseEvent(ui::MouseEvent* event) override;
   void OnGestureEvent(ui::GestureEvent* event) override;
 
   // KeyboardControllerObserver overrides:
   void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override;
   void OnKeyboardClosed() override;
 
+  // ShelfObserver overrides:
+  void OnShelfIconPositionChanged();

[oshima, 2017/06/13 22:26:04]

override?

[newcomer, 2017/06/13 23:00:39]

Function removed as a side effect of xiyuan@'s comment. But correct, thanks!

+
   // ShellObserver overrides:
   void OnOverviewModeStarting() override;
+  void OnMaximizeModeStarted() override;
+  void OnMaximizeModeEnded() override;
 
   // Whether the app list is visible (or in the process of being shown).
   bool is_visible_ = false;
 
   // Not owned. Pointer is guaranteed to be valid while this object is alive.
   app_list::AppListPresenterImpl* presenter_;
 
   // Not owned. Pointer is guaranteed to be valid while this object is alive.
   app_list::AppListViewDelegateFactory* view_delegate_factory_;
 
   // Owned by its widget.
   app_list::AppListView* view_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(AppListPresenterDelegate);
 };
 
 }  // namespace ash
 
 #endif  // ASH_APP_LIST_APP_LIST_PRESENTER_DELEGATE_H_