[iOS/GN] Fix and enable "gn check" for "//ios/*" and "//ios_internal/*".

ios/public/provider/web/BUILD.gn

 # Copyright 2015 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("web") {
   sources = [
     "web_controller_provider.h",
     "web_controller_provider.mm",
     "web_ui_ios.h",
     "web_ui_ios_controller.cc",
     "web_ui_ios_controller.h",
     "web_ui_ios_controller_factory.h",
     "web_ui_ios_message_handler.cc",
     "web_ui_ios_message_handler.h",
   ]
 
   deps = [
     "//base",
     "//ios/web",
+    "//url",
   ]
+
+  allow_circular_includes_from = [ "//ios/web" ]
 }