Logging tweak for sync integration test harness

chrome/test/live_sync/many_client_live_preferences_sync_test.cc

Index: chrome/test/live_sync/many_client_live_preferences_sync_test.cc
diff --git a/chrome/test/live_sync/many_client_live_preferences_sync_test.cc b/chrome/test/live_sync/many_client_live_preferences_sync_test.cc
index 83880b8dd97f1f7f84caac7aab021e47291635b0..7da22532a4fcedd4ce63b972ddd3af195f5c510c 100644
--- a/chrome/test/live_sync/many_client_live_preferences_sync_test.cc
+++ b/chrome/test/live_sync/many_client_live_preferences_sync_test.cc
@@ -12,7 +12,7 @@ IN_PROC_BROWSER_TEST_F(ManyClientLivePreferencesSyncTest, Sanity) {
   GetVerifierPrefs()->SetBoolean(prefs::kHomePageIsNewTabPage, new_value);
   GetPrefs(0)->SetBoolean(prefs::kHomePageIsNewTabPage, new_value);
 
-  GetClient(0)->AwaitGroupSyncCycleCompletion(clients());
+  ASSERT_TRUE(GetClient(0)->AwaitGroupSyncCycleCompletion(clients()));
 
   for (int i = 0; i < num_clients(); ++i) {
     ASSERT_EQ(GetVerifierPrefs()->GetBoolean(prefs::kHomePageIsNewTabPage),