Fixed nullptr default network crash.

chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc

Index: chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc
diff --git a/chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc b/chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc
index ed84f898c432e9a4e70cef4421d9463ba16e7dd1..d24a3bf08e254037eb8cd9d62e1be3f7251c4296 100644
--- a/chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc
+++ b/chrome/browser/chromeos/arc/arc_settings_service_browsertest.cc
@@ -348,4 +348,16 @@ IN_PROC_BROWSER_TEST_F(ArcSettingsServiceTest, DefaultNetworkDisconnectedTest) {
             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