Clear g_created_policy_service at BrowserPolicyConnector::Shutdown.

components/policy/core/browser/browser_policy_connector.cc

Index: components/policy/core/browser/browser_policy_connector.cc
diff --git a/components/policy/core/browser/browser_policy_connector.cc b/components/policy/core/browser/browser_policy_connector.cc
index 109121ee1681bf13797ebf00e168819a09715648..1bad6f404ef76d2032eb6571ab945256368ca2cf 100644
--- a/components/policy/core/browser/browser_policy_connector.cc
+++ b/components/policy/core/browser/browser_policy_connector.cc
@@ -116,6 +116,7 @@ void BrowserPolicyConnector::Shutdown() {
   // Drop g_testing_provider so that tests executed with --single_process can
   // call SetPolicyProviderForTesting() again. It is still owned by the test.
   g_testing_provider = NULL;
+  g_created_policy_service = false;
   device_management_service_.reset();
 }