Factor iOS native image loading into a utility function.

ios/chrome/browser/ui/autofill/cells/BUILD.gn

 # 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.
 
 source_set("cells") {
   sources = [
     "cvc_item.h",
     "cvc_item.mm",
     "status_item.h",
     "status_item.mm",
     "storage_switch_item.h",
     "storage_switch_item.mm",
   ]
 
   deps = [
     "//components/resources",
     "//components/strings",
     "//ios/chrome/app/strings",
     "//ios/chrome/app/theme",
+    "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/collection_view/cells",
     "//ios/chrome/browser/ui/colors",
     "//ios/public/provider/chrome/browser",
     "//ios/public/provider/chrome/browser/ui",
     "//ios/third_party/material_components_ios",
     "//ios/third_party/material_roboto_font_loader_ios",
     "//ui/base",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
@@ skipping 11 matching lines @@
     ":cells",
     "//base",
     "//components/resources",
     "//ios/chrome/browser/ui/collection_view/cells",
     "//ios/third_party/material_components_ios",
     "//testing/gtest",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 }