Added HALF, FULLSCREEN_ALL_APPS, and FULLSCREEN_SEARCH.

ui/app_list/views/app_list_view.h

Index: ui/app_list/views/app_list_view.h
diff --git a/ui/app_list/views/app_list_view.h b/ui/app_list/views/app_list_view.h
index 84b0ead9ee660a16e645eb092769b65e1481c720..27187a8031c2aa96ddcc324fdb5c7ca7ff2f9432 100644
--- a/ui/app_list/views/app_list_view.h
+++ b/ui/app_list/views/app_list_view.h
@@ -42,15 +42,20 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
                                     public display::DisplayObserver {
  public:
   enum AppListState {
-    // If set, closes |app_list_main_view_| and dismisses the delegate.
+    // Closes |app_list_main_view_| and dismisses the delegate.

[vadimt, 2017/06/13 18:14:11]

Good :)

[newcomer, 2017/06/13 18:51:46]

Acknowledged.

     CLOSED = 0,
-
-    // The initial state for the app list. If set, the widget will peek over
-    // the shelf by kPeekingAppListHeight DIPs.
+    // The initial state for the app list when neither maximize or side shelf
+    // modes are active. If set, the widget will peek over the shelf by
+    // kPeekingAppListHeight DIPs.
     PEEKING,
-
-    // If set, the widget will be repositioned to take up the whole screen.
-    FULLSCREEN,
+    // Entered when text is entered into the search box from peeking mode.
+    HALF,
+    // Default app list state in maximize and side shelf modes. Entered from an
+    // upward swipe from |PEEKING| or from clicking the chevron.
+    FULLSCREEN_ALL_APPS,
+    // Entered from an upward swipe from |HALF| or by entering text in the
+    // search box from |FULLSCREEN_ALL_APPS|.
+    FULLSCREEN_SEARCH,
   };
 
   // Does not take ownership of |delegate|.
@@ -60,7 +65,10 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
   // Initializes the widget as a bubble or fullscreen view depending on if the
   // fullscreen app list feature is set. |parent| and |initial_apps_page| are
   // used for both the bubble and fullscreen initialization.
-  void Initialize(gfx::NativeView parent, int initial_apps_page);
+  void Initialize(gfx::NativeView parent,
+                  int initial_apps_page,
+                  bool is_mazimize_mode = false,
+                  bool is_side_shelf = false);
 
   void SetBubbleArrow(views::BubbleBorder::Arrow arrow);
 
@@ -109,9 +117,21 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
   // Changes the app list state.
   void SetState(AppListState new_state);
 
-  bool is_fullscreen() const { return app_list_state_ == FULLSCREEN; }
+  // Changes the app list state based on the SearchBox text and the current
+  // |app_list_state|.

[vadimt, 2017/06/13 18:14:11]

the current |app_list_state| => app_list_state_

[newcomer, 2017/06/13 18:51:46]

Done.

+  void SetStateFromSearchBoxView(bool empty);
+
+  bool is_fullscreen() const {
+    return app_list_state_ == FULLSCREEN_ALL_APPS ||
+           app_list_state_ == FULLSCREEN_SEARCH;
+  }
+
   AppListState app_list_state() const { return app_list_state_; }
 
+  // Called from the AppListPresenterDelegate when maximize mode starts and

[vadimt, 2017/06/13 18:14:11]

No from, only when.

[newcomer, 2017/06/13 18:51:46]

Done.

+  // ends.
+  void OnMaximizeModeChanged(bool shown);
+
  private:
   friend class test::AppListViewTestApi;
 
@@ -174,6 +194,11 @@ class APP_LIST_EXPORT AppListView : public views::BubbleDialogDelegateView,
   // Owned by the app list's widget. Null if the fullscreen app list is not
   // enabled.
   views::View* app_list_background_shield_ = nullptr;
+  // Whether maximize mode is active.
+  bool is_maximize_mode_;

[vadimt, 2017/06/13 18:14:11]

Initialize here

[newcomer, 2017/06/13 18:51:46]

Done.

+  // Whether the shelf is oriented on the side.
+  bool is_side_shelf_;
+
   // The gap between the initial gesture event and the top of the window.
   gfx::Point initial_drag_point_;
   // The velocity of the gesture event.