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 241 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;

[bruthig, 2016/06/17 17:58:45]

You might want to run this change by jamescook@ sooner rather than later.  I
think he was trying to eliminate the Shelf helper methods in ash::Shell.

[mohsen, 2016/06/18 06:25:15]

Sure. Will send the patch to jamescook@ ASAP. But, I guess whatever we do for
other helpers can be done for this one, too.

+
   // Returns app list target visibility.
   bool GetAppListTargetVisibility() const;
 
   // Returns true if a system-modal dialog window is currently open.
   bool IsSystemModalWindowOpen() const;
 
   // For testing only: set simulation that a modal window is open
   void SimulateModalWindowOpenForTesting(bool modal_window_open) {
     simulate_modal_window_open_for_testing_ = modal_window_open;
   }
@@ skipping 515 matching lines @@
   bool in_mus_ = false;
 
   std::unique_ptr<KeyboardUI> keyboard_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_