[Material][Mac] Update the User Account Button

ui/gfx/vector_icons/BUILD.gn

 # Copyright 2014 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.
 
 action("aggregate_vector_icons") {
   visibility = [ ":*" ]
 
   script = "aggregate_vector_icons.py"
 
   icons = [
@@ skipping 208 matching lines @@
     "tab_close_hovered_pressed.1x.icon",
     "tab_close_hovered_pressed.icon",
     "tab_close_normal.1x.icon",
     "tab_close_normal.icon",
     "tab_media_capturing.icon",
     "tab_media_recording.icon",
     "tab_usb_connected.1x.icon",
     "tab_usb_connected.icon",
     "tablet.icon",
     "translate.icon",
+    "user_account_avatar.icon",
     "videocam.icon",
     "warning.icon",
     "warning_badge.icon",
     "web.icon",
     "window_control_back.1x.icon",
     "window_control_back.icon",
     "window_control_close.1x.icon",
     "window_control_close.icon",
     "window_control_left_snapped.1x.icon",
     "window_control_left_snapped.icon",
@@ skipping 38 matching lines @@
     "../vector_icon_types.h",
     "../vector_icons_public.h",
   ]
 
   deps = [
     ":aggregate_vector_icons",
     "//base",
     "//skia",
   ]
 }