[ObjC ARC] Converts ios/chrome/browser/ui/webui:webui_internal to ARC.

ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.mm

 // 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.
 
 #include "ios/chrome/browser/ui/webui/chrome_web_ui_ios_controller_factory.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #include "ios/chrome/browser/experimental_flags.h"
 #include "ios/chrome/browser/ui/webui/about_ui.h"
 #include "ios/chrome/browser/ui/webui/crashes_ui.h"
 #include "ios/chrome/browser/ui/webui/flags_ui.h"
 #include "ios/chrome/browser/ui/webui/gcm/gcm_internals_ui.h"
 #include "ios/chrome/browser/ui/webui/net_export/net_export_ui.h"
 #include "ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.h"
 #include "ios/chrome/browser/ui/webui/omaha_ui.h"
 #include "ios/chrome/browser/ui/webui/physical_web_ui.h"
 #include "ios/chrome/browser/ui/webui/popular_sites_internals_ui.h"
 #include "ios/chrome/browser/ui/webui/signin_internals_ui_ios.h"
 #include "ios/chrome/browser/ui/webui/sync_internals/sync_internals_ui.h"
 #include "ios/chrome/browser/ui/webui/version_ui.h"
 #include "url/gurl.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using web::WebUIIOS;
 using web::WebUIIOSController;
 
 namespace {
 
 // A function for creating a new WebUIIOS.
 using WebUIIOSFactoryFunction =
     std::unique_ptr<WebUIIOSController> (*)(WebUIIOS* web_ui, const GURL& url);
 
 // Template for defining WebUIIOSFactoryFunction.
@@ skipping 70 matching lines @@
 
 // static
 ChromeWebUIIOSControllerFactory*
 ChromeWebUIIOSControllerFactory::GetInstance() {
   return base::Singleton<ChromeWebUIIOSControllerFactory>::get();
 }
 
 ChromeWebUIIOSControllerFactory::ChromeWebUIIOSControllerFactory() {}
 
 ChromeWebUIIOSControllerFactory::~ChromeWebUIIOSControllerFactory() {}