Fix cyclic dependency between ProfilePolicyConnector and PrefService.

chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc

Index: chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc
diff --git a/chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc b/chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc
index 6b48c5cad2e4674e212ac93c91b0ab9fe2633da9..f9c854f1e3cf96b2296a13dd09427d34283be449 100644
--- a/chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc
+++ b/chrome/browser/chromeos/policy/network_configuration_updater_unittest.cc
@@ -246,14 +246,14 @@ TEST_F(NetworkConfigurationUpdaterTest,
 
   // Certificates with the "Web" trust flag set should not be forwarded to the
   // trust provider.
-  policy::PolicyCertVerifier cert_verifier((
-      base::Closure() /* no policy cert trusted callback */));
+  policy::PolicyCertVerifier cert_verifier;
   updater->SetPolicyCertVerifier(&cert_verifier);
   base::RunLoop().RunUntilIdle();
   EXPECT_TRUE(cert_verifier.GetAdditionalTrustAnchors().empty());
 
   // |cert_verifier| must outlive the updater.
   network_configuration_updater_.reset();
+  cert_verifier.ShutdownOnUIThread();
 }
 
 TEST_F(NetworkConfigurationUpdaterTest, AllowTrustedCertificatesFromPolicy) {
@@ -276,14 +276,14 @@ TEST_F(NetworkConfigurationUpdaterTest, AllowTrustedCertificatesFromPolicy) {
 
   // Certificates with the "Web" trust flag set should be forwarded to the
   // trust provider.
-  policy::PolicyCertVerifier cert_verifier((
-      base::Closure() /* no policy cert trusted callback */));
+  policy::PolicyCertVerifier cert_verifier;
   updater->SetPolicyCertVerifier(&cert_verifier);
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(1u, cert_verifier.GetAdditionalTrustAnchors().size());
 
   // |cert_verifier| must outlive the updater.
   network_configuration_updater_.reset();
+  cert_verifier.ShutdownOnUIThread();
 }
 
 class NetworkConfigurationUpdaterTestWithParam