[iOS/OS X] Allow base::scoped_nsobject<> to be used when ARC is enabled.

ios/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.
 
 import("//testing/test.gni")
 import("//ios/web/js_compile.gni")
 
 source_set("web") {
   deps = [
     ":core",
@@ skipping 49 matching lines @@
     "navigation/navigation_manager_impl.mm",
     "navigation/nscoder_util.h",
     "navigation/nscoder_util.mm",
     "navigation/time_smoother.cc",
     "navigation/time_smoother.h",
     "net/cert_host_pair.cc",
     "net/cert_host_pair.h",
     "net/cert_policy.cc",
     "net/cert_store_impl.cc",
     "net/cert_store_impl.h",
-    "net/cert_verifier_block_adapter.cc",
     "net/cert_verifier_block_adapter.h",
+    "net/cert_verifier_block_adapter.mm",
     "net/certificate_policy_cache.cc",
     "net/clients/crw_csp_network_client.h",
     "net/clients/crw_csp_network_client.mm",
     "net/clients/crw_js_injection_network_client.h",
     "net/clients/crw_js_injection_network_client.mm",
     "net/clients/crw_js_injection_network_client_factory.h",
     "net/clients/crw_js_injection_network_client_factory.mm",
     "net/clients/crw_passkit_delegate.h",
     "net/clients/crw_passkit_network_client.h",
     "net/clients/crw_passkit_network_client.mm",
@@ skipping 394 matching lines @@
   public_deps = [
     ":web_bundle",
   ]
 
   sources = [
     "web_state/js/resources/plugin_placeholder.js",
     "web_state/js/resources/window_id.js",
     "webui/resources/web_ui.js",
   ]
 }