Add MD ink drop ripple to app list button

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 236 matching lines @@
   // list should be shown. If this is NULL, the active root window
   // will be used.
   void ShowAppList(aura::Window* anchor);
 
   // Dismisses the app list.
   void DismissAppList();
 
   // Shows the app list if it's not visible. Dismisses it otherwise.
   void ToggleAppList(aura::Window* anchor);
 
+  // Returns app list actual visibility. This might differ from
+  // GetAppListTargetVisibility() when hiding animation is still in flight.
+  bool IsApplistVisible() const;

[James Cook, 2016/06/23 20:08:08]

I'm OK with this given the other 4 app-list methods on ash::Shell. In general,
though, I'm trying to move things to ash::WmShell and ash::WmShelf where
possible.

[mohsen, 2016/06/27 22:17:10]

Acknowledged.

+
   // Returns app list target visibility.
   bool GetAppListTargetVisibility() const;
 
   // Creates a default views::NonClientFrameView for use by windows in the
   // Ash environment.
   views::NonClientFrameView* CreateDefaultNonClientFrameView(
       views::Widget* widget);
 
   // Sets the work area insets of the display that contains |window|,
   // this notifies observers too.
@@ skipping 508 matching lines @@
   bool in_mus_ = false;
 
   std::unique_ptr<KeyboardUI> keyboard_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_