[USS] Fix USS in sync_integration_tests in chromeos

chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc

Index: chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc b/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
index 08ec1b58b4e52f573fe012366fe260853bc193ec..8590b00e406a48c23d8eabf1e0abf744202c33a3 100644
--- a/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
@@ -20,6 +20,10 @@
 #include "components/sync/test/fake_server/fake_server_verifier.h"
 #include "components/sync/test/fake_server/sessions_hierarchy.h"
 
+#if defined(OS_CHROMEOS)
+#include "chromeos/chromeos_switches.h"
+#endif
+
 using base::HistogramBase;
 using base::HistogramSamples;
 using base::HistogramTester;
@@ -66,6 +70,8 @@ class SingleClientSessionsSyncTest : public SyncTest {
 
     if (!cl->HasSwitch(switches::kSyncShortInitialRetryOverride))
       cl->AppendSwitch(switches::kSyncShortInitialRetryOverride);
+
+    SyncTest::SetUpCommandLine(cl);

[Patrick Noland, 2017/02/22 01:04:43]

This will probably make CookieJarMismatch flaky again :( The point of overriding
SetUpCommandLine is to specifically avoid calling SyncTests's implementation
since it triggers the flakiness. 

[Gang Wu, 2017/02/22 06:32:03]

Done.

   }
 
  private: