Use ink drop hover for focus states on toolbar buttons and location

chrome/browser/ui/views/toolbar/toolbar_button.h

 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 83 matching lines @@
 
   // Y position of mouse when left mouse button is pressed.
   int y_position_on_lbuttondown_;
 
   // The model adapter for the drop down menu.
   std::unique_ptr<views::MenuModelAdapter> menu_model_adapter_;
 
   // Menu runner to display drop down menu.
   std::unique_ptr<views::MenuRunner> menu_runner_;
 
-  // Controls the visual feedback for the button state.
-  std::unique_ptr<views::InkDropDelegate> ink_drop_delegate_;
-
   // A factory for tasks that show the dropdown context menu for the button.
   base::WeakPtrFactory<ToolbarButton> show_menu_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarButton);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_