Add DCHECK to make sure Profile instance is same.

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

Index: chrome/browser/sync/test/integration/sync_test.cc
diff --git a/chrome/browser/sync/test/integration/sync_test.cc b/chrome/browser/sync/test/integration/sync_test.cc
index 74d65493dbdf1f5de76f631263c629f7c14cbe3b..b00072f4983e59f1409a5f2d32c7508fa8d3f103 100644
--- a/chrome/browser/sync/test/integration/sync_test.cc
+++ b/chrome/browser/sync/test/integration/sync_test.cc
@@ -90,7 +90,6 @@
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/chromeos_switches.h"
-#include "components/arc/arc_util.h"
 #endif
 
 using browser_sync::ProfileSyncService;
@@ -299,7 +298,6 @@ void SyncTest::SetUpCommandLine(base::CommandLine* cl) {
 
 #if defined(OS_CHROMEOS)
   cl->AppendSwitch(chromeos::switches::kIgnoreUserProfileMappingForTests);
-  arc::SetArcAvailableCommandLineForTesting(cl);
 #endif
 }