[GCM] Update ResetStore histograms

components/gcm_driver/gcm_client_impl_unittest.cc

Index: components/gcm_driver/gcm_client_impl_unittest.cc
diff --git a/components/gcm_driver/gcm_client_impl_unittest.cc b/components/gcm_driver/gcm_client_impl_unittest.cc
index 2ec07f6923b0e6bd106daffd5cbd3a01fdffc037..e799f28213f6aedbc1203826e1f038146af5efd7 100644
--- a/components/gcm_driver/gcm_client_impl_unittest.cc
+++ b/components/gcm_driver/gcm_client_impl_unittest.cc
@@ -689,10 +689,14 @@ TEST_F(GCMClientImplTest, LoadingBusted) {
 
   // Restart GCM client. The store should be reset and the loading should
   // complete successfully.
+
+  base::HistogramTester histogram_tester;
   reset_last_event();
   BuildGCMClient(base::TimeDelta());
   InitializeGCMClient();
   StartGCMClient();
+  histogram_tester.ExpectUniqueSample("GCM.ResetStoreReason",
+                                      0 /* Loading failed. */, 1);
   ASSERT_NO_FATAL_FAILURE(
       CompleteCheckin(kDeviceAndroidId2, kDeviceSecurityToken2, std::string(),
                       std::map<std::string, std::string>()));
@@ -1241,6 +1245,8 @@ TEST_F(GCMClientImplCheckinTest, ResetStoreWhenCheckinRejected) {
   std::map<std::string, std::string> settings;
   ASSERT_NO_FATAL_FAILURE(FailCheckin(net::HTTP_UNAUTHORIZED));
   PumpLoopUntilIdle();
+  histogram_tester.ExpectUniqueSample("GCM.ResetStoreReason",
+                                      1 /* Checkin rejected. */, 1);
 
   // Store should have been destroyed. Restart client and verify the initial
   // checkin response is persisted.