Update avatar button to MD (part 1)

chrome/browser/ui/views/profiles/avatar_button_delegate.h

Index: chrome/browser/ui/views/profiles/avatar_button_delegate.h
diff --git a/chrome/browser/ui/views/profiles/avatar_button_delegate.h b/chrome/browser/ui/views/profiles/avatar_button_delegate.h
deleted file mode 100644
index a5f0bb60559bc443a36e635632e5e99e527884d1..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/views/profiles/avatar_button_delegate.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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_PROFILES_AVATAR_BUTTON_DELEGATE_H_
-#define CHROME_BROWSER_UI_VIEWS_PROFILES_AVATAR_BUTTON_DELEGATE_H_
-
-#include "ui/views/controls/button/button.h"
-
-// Delegate allowing NewAvatarButton to communicate back to its manager.
-class AvatarButtonDelegate : public views::ButtonListener {
- public:
-  // Called when the preferred size changed, e.g., due to a profile name change.
-  virtual void ButtonPreferredSizeChanged() = 0;
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_PROFILES_AVATAR_BUTTON_DELEGATE_H_