Update content settings to new vector icon format.

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.
 
 import("//build/config/chrome_build.gni")
 
 # NB: This is a deprecated vector icon target that should be removed. Add vector
 # icons to a more specific target, or ui/vector_icons if ui/ is the right place
 # for them. TODO(estade): remove this target.
 action("aggregate_vector_icons") {
   visibility = [ ":*" ]
 
   script = "aggregate_vector_icons.py"
 
   icons = [
     "account_box.icon",
     "account_child.icon",
     "account_child_circle.icon",
     "account_circle.icon",
-    "blocked_badge.icon",
     "business.icon",
     "check_circle.1x.icon",
     "check_circle.icon",
     "close_all.icon",
-    "code.icon",
-    "cookie.icon",
     "default_favicon.icon",
     "eol.icon",
-    "extension.icon",
-    "file_download.icon",
     "fullscreen.icon",
     "help_outline.icon",
-    "image.icon",
     "info_outline.icon",
     "lock.icon",
-    "midi.icon",
-    "mixed_content.icon",
     "mode_edit.icon",
-    "my_location.icon",
     "notifications.icon",
     "notifications_off.icon",
 
     # TODO(estade): this is the same as the one in components/omnibox, but it's
     # referenced from Ash. De-dupe this soon.
     "omnibox_search.icon",
     "pdf.1x.icon",
     "pdf.icon",
     "photo_camera.icon",
-    "protocol_handler.icon",
     "remove_box.icon",
     "remove_circle.icon",
     "settings.icon",
-    "subresource_filter_active.icon",
     "supervisor_account.icon",
     "supervisor_account_circle.icon",
     "sync_problem.icon",
     "user_account_avatar.icon",
-    "videocam.icon",
     "warning.icon",
-    "warning_badge.icon",
     "web.icon",
   ]
 
   if (is_mac) {
     icons += [ "google_search_mac_touchbar.icon" ]
   }
 
   output_cc = "$target_gen_dir/vector_icons.cc"
   output_h = "$target_gen_dir/vector_icons.h"
 
@@ skipping 24 matching lines @@
     "../vector_icon_types.h",
     "../vector_icons_public.h",
   ]
 
   deps = [
     ":aggregate_vector_icons",
     "//base",
     "//skia",
   ]
 }