Draggable peeking/fullscreen launcher with transparent background.

ash/shelf/shelf.h

 // Copyright 2016 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_SHELF_SHELF_H_
 #define ASH_SHELF_SHELF_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 117 matching lines @@
   void AddObserver(ShelfObserver* observer);
   void RemoveObserver(ShelfObserver* observer);
 
   void NotifyShelfIconPositionsChanged();
   StatusAreaWidget* GetStatusAreaWidget() const;
 
   void SetVirtualKeyboardBoundsForTesting(const gfx::Rect& bounds);
   ShelfLockingManager* GetShelfLockingManagerForTesting();
   ShelfView* GetShelfViewForTesting();
 
+  // Notifies ShelfLayoutManager that the app list is active in order to

[vadimt, 2017/05/26 01:27:56]

You either call it NotifyXXX and keep the comment or leave the name as OnXXX,
and change the comment to "called when XXX".

[newcomer, 2017/05/26 17:11:27]

Done.

+  // restrict the background behavior.
+  void OnAppListIsActive(bool hideBackground);
+
  protected:
   // ShelfLayoutManagerObserver:
   void WillDeleteShelfLayoutManager() override;
   void WillChangeVisibilityState(ShelfVisibilityState new_state) override;
   void OnAutoHideStateChanged(ShelfAutoHideState new_state) override;
   void OnBackgroundUpdated(ShelfBackgroundType background_type,
                            AnimationChangeType change_type) override;
 
  private:
   class AutoHideEventHandler;
@@ skipping 21 matching lines @@
   // Forwards touch gestures on a bezel sensor to the shelf.
   // TODO(mash): Facilitate simliar functionality in mash: crbug.com/636647
   std::unique_ptr<ShelfBezelEventHandler> bezel_event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(Shelf);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_H_