metrics: call LoginState::Shutdown() at end of unit tests

chrome/browser/metrics/metrics_log_unittest.cc

Index: chrome/browser/metrics/metrics_log_unittest.cc
diff --git a/chrome/browser/metrics/metrics_log_unittest.cc b/chrome/browser/metrics/metrics_log_unittest.cc
index cfc9b9c71a01196bc22f03d1d07996f197aff1f9..f6ee93b00ac606ad4d0cb0037ebaf4d6d700990a 100644
--- a/chrome/browser/metrics/metrics_log_unittest.cc
+++ b/chrome/browser/metrics/metrics_log_unittest.cc
@@ -123,6 +123,14 @@ class MetricsLogTest : public testing::Test {
 #endif  // defined(OS_CHROMEOS)
   }
 
+  virtual ~MetricsLogTest() {
+#if defined(OS_CHROMEOS)
+    // TODO(blundell): Remove this code once MetricsService no longer creates
+    // ChromeOSMetricsProvider.
+    chromeos::LoginState::Shutdown();
+#endif  // defined(OS_CHROMEOS)
+  }
+
  protected:
   // Check that the values in |system_values| correspond to the test data
   // defined at the top of this file.