Update avatar button to MD (part 1)

chrome/browser/ui/views/frame/avatar_button_manager.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 CHROME_BROWSER_UI_VIEWS_FRAME_AVATAR_BUTTON_MANAGER_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_AVATAR_BUTTON_MANAGER_H_
 
-#include "chrome/browser/ui/views/profiles/avatar_button_delegate.h"
 #include "chrome/browser/ui/views/profiles/avatar_button_style.h"
+#include "ui/views/controls/button/button.h"
 
 class BrowserNonClientFrameView;
 
 // Manages an avatar button displayed in a browser frame. The button displays
 // the name of the active or guest profile, and may be null.
-class AvatarButtonManager : public AvatarButtonDelegate {
+class AvatarButtonManager : public views::ButtonListener {
  public:
   explicit AvatarButtonManager(BrowserNonClientFrameView* frame_view);
 
   // Adds or removes the avatar button from the frame, based on the BrowserView
   // properties.
   void Update(AvatarButtonStyle style);
 
   // Gets the avatar button as a view::View.
   views::View* view() const { return view_; }
 
- private:
-  // AvatarButtonDelegate:
-  void ButtonPreferredSizeChanged() override;
-
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
+ private:
   BrowserNonClientFrameView* frame_view_;  // Weak. Owns |this|.
 
   // Menu button that displays the name of the active or guest profile.
   // May be null and will not be displayed for off the record profiles.
   views::View* view_;  // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(AvatarButtonManager);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_AVATAR_BUTTON_MANAGER_H_