Fixed nullptr default network crash.

chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc

 // 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.
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 330 matching lines @@
   expected_wifi_proxy_config->SetString("mode",
                                         ProxyPrefs::kFixedServersProxyModeName);
   expected_wifi_proxy_config->SetString("host", "wifi/proxy");
   expected_wifi_proxy_config->SetInteger("port", 8080);
 
   EXPECT_EQ(CountProxyBroadcasts(fake_intent_helper_instance_->broadcasts(),
                                  expected_wifi_proxy_config.get()),
             1);
 }
 
+IN_PROC_BROWSER_TEST_F(ArcSettingsServiceTest, NoNetworkConnectedTest) {
+  // Disconnect all networks.
+  fake_intent_helper_instance_->clear_broadcasts();
+  DisconnectNetworkService(kDefaultServicePath);
+  DisconnectNetworkService(kWifiServicePath);
+  RunUntilIdle();
+
+  EXPECT_EQ(
+      CountProxyBroadcasts(fake_intent_helper_instance_->broadcasts(), nullptr),
+      0);
+}
+
 }  // namespace arc