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

chrome/browser/ui/views/bar_control_button.h

 // Copyright 2015 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_BAR_CONTROL_BUTTON_H_
 #define CHROME_BROWSER_UI_VIEWS_BAR_CONTROL_BUTTON_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 21 matching lines @@
                const base::Callback<SkColor(void)>& get_text_color_callback);
 
   // views::ImageButton:
   void OnThemeChanged() override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
 
  private:
   gfx::VectorIconId id_;
   base::Callback<SkColor(void)> get_text_color_callback_;
 
-  // Controls the visual feedback for the button state.
-  std::unique_ptr<views::InkDropDelegate> ink_drop_delegate_;
-
   DISALLOW_COPY_AND_ASSIGN(BarControlButton);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_BAR_CONTROL_BUTTON_H_