[ObjC ARC] Converts ios/chrome/browser/geolocation:geolocation_internal to ARC.

ios/chrome/browser/geolocation/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("geolocation") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "CLLocation+OmniboxGeolocation.h",
     "CLLocation+OmniboxGeolocation.mm",
     "CLLocation+XGeoHeader.h",
@@ skipping 49 matching lines @@
     "//base",
     "//components/prefs:test_support",
     "//ios/chrome/test:test_support",
     "//ios/public/provider/chrome/browser",
     "//testing/gtest",
     "//third_party/ocmock",
   ]
 }
 
 source_set("geolocation_internal") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "omnibox_geolocation_controller+Testing.h",
     "omnibox_geolocation_controller.h",
     "omnibox_geolocation_controller.mm",
   ]
   deps = [
     ":geolocation",
     "//base",
     "//components/google/core/browser",
     "//components/version_info",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/tabs",
     "//ios/web",
     "//ui/base",
     "//url",
   ]
   libs = [
     "CoreLocation.framework",
     "UIKit.framework",
   ]
 }