Fix cyclic dependency between ProfilePolicyConnector and PrefService.

chrome/browser/chromeos/policy/user_network_configuration_updater.cc

Index: chrome/browser/chromeos/policy/user_network_configuration_updater.cc
diff --git a/chrome/browser/chromeos/policy/user_network_configuration_updater.cc b/chrome/browser/chromeos/policy/user_network_configuration_updater.cc
index 49c2552ded99d32337fc11d173e004524e360862..8bcf47baded5d816320b923b58120bc29aba8790 100644
--- a/chrome/browser/chromeos/policy/user_network_configuration_updater.cc
+++ b/chrome/browser/chromeos/policy/user_network_configuration_updater.cc
@@ -18,7 +18,9 @@
 
 namespace policy {
 
-UserNetworkConfigurationUpdater::~UserNetworkConfigurationUpdater() {}
+UserNetworkConfigurationUpdater::~UserNetworkConfigurationUpdater() {
+  DCHECK(cert_verifiers_.empty());
+}
 
 // static
 scoped_ptr<UserNetworkConfigurationUpdater>
@@ -50,15 +52,21 @@ UserNetworkConfigurationUpdater::UserNetworkConfigurationUpdater(
                                   policy_service,
                                   network_config_handler),
       allow_trusted_certificates_from_policy_(allow_trusted_certs_from_policy),
-      user_(&user),
-      cert_verifier_(NULL) {}
+      user_(&user) {}
 
-void UserNetworkConfigurationUpdater::SetPolicyCertVerifier(
+void UserNetworkConfigurationUpdater::AddPolicyCertVerifier(
     PolicyCertVerifier* cert_verifier) {
-  cert_verifier_ = cert_verifier;
+  DCHECK(cert_verifiers_.find(cert_verifier) == cert_verifiers_.end());
+  cert_verifiers_.insert(cert_verifier);
   SetTrustAnchors();
 }
 
+void UserNetworkConfigurationUpdater::RemovePolicyCertVerifier(
+    PolicyCertVerifier* cert_verifier) {
+  size_t count = cert_verifiers_.erase(cert_verifier);
+  DCHECK(count > 0);
+}
+
 void UserNetworkConfigurationUpdater::GetWebTrustedCertificates(
     net::CertificateList* certs) const {
   *certs = web_trust_certs_;
@@ -88,14 +96,20 @@ void UserNetworkConfigurationUpdater::ApplyNetworkPolicy(
 }
 
 void UserNetworkConfigurationUpdater::SetTrustAnchors() {
-  if (!cert_verifier_)
-    return;
-  content::BrowserThread::PostTask(
-      content::BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&PolicyCertVerifier::SetTrustAnchors,
-                 base::Unretained(cert_verifier_),
-                 web_trust_certs_));
+  for (std::set<PolicyCertVerifier*>::const_iterator it =
+           cert_verifiers_.begin();
+       it != cert_verifiers_.end();
+       ++it) {
+    // It's safe to use base::Unretained here, because profile_io_data which
+    // owns the CertVerifier is deleted by a DeleteSoon on IO, i.e. after all
+    // pending tasks on IO are finished.
+    content::BrowserThread::PostTask(
+        content::BrowserThread::IO,
+        FROM_HERE,
+        base::Bind(&PolicyCertVerifier::SetTrustAnchors,
+                   base::Unretained(*it),
+                   web_trust_certs_));
+  }
 }
 
 }  // namespace policy