[Win] Add a fast profile switcher to the Windows taskbar item.

chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc

-// 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.
-
-#include "chrome/browser/profiles/avatar_menu.h"
-
-#include <string>
-
-#include "ash/frame/frame_util.h"
-#include "chrome/browser/profiles/profile.h"
-#include "ui/gfx/image/image.h"
-
-// static
-void AvatarMenu::GetImageForMenuButton(Profile* profile,
-                                       gfx::Image* image,
-                                       bool* is_rectangle) {
-  // ChromeOS avatar icon is circular.
-  *is_rectangle = false;
-  *image = ash::GetAvatarImageForContext(profile);
-}