Refactored the CloudPolicyProvider so that it becomes initialized once and stays initialized.

chrome/browser/policy/configuration_policy_provider.cc

Index: chrome/browser/policy/configuration_policy_provider.cc
diff --git a/chrome/browser/policy/configuration_policy_provider.cc b/chrome/browser/policy/configuration_policy_provider.cc
index 6d67d67d149e2bfb5275fa6ed55d2a25b7a3c3a0..4ecb9ecbb58d53ba0d506c54d5497357002fecc7 100644
--- a/chrome/browser/policy/configuration_policy_provider.cc
+++ b/chrome/browser/policy/configuration_policy_provider.cc
@@ -97,7 +97,11 @@ void ConfigurationPolicyProvider::FixDeprecatedPolicies(PolicyMap* policies) {
       policies->Erase(kProxyPolicies[i]);
     }
   }
-  if (!proxy_settings->empty() && !policies->Get(key::kProxySettings)) {
+  // Sets the new |proxy_settings| if kProxySettings isn't set yet, or if the
+  // new priority is higher.
+  const PolicyMap::Entry* existing = policies->Get(key::kProxySettings);
+  if (!proxy_settings->empty() &&
+      (!existing || current_priority.has_higher_priority_than(*existing))) {
     policies->Set(key::kProxySettings,
                   current_priority.level,
                   current_priority.scope,