Reenable test in TwoClientPasswordsSyncTest

Recent patches have fixed the observed DCHECK issue, so the flakiness
is believed to be gone.

Bug: 873494
Change-Id: I9821f879b0be1c0ffb11004be2ae69182b6fd342
Reviewed-on: https://chromium-review.googlesource.com/c/1347357Reviewed-by: Jan Krcal <jkrcal@chromium.org>
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610346}

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

@@ -99,14 +99,8 @@ IN_PROC_BROWSER_TEST_P(TwoClientPasswordsSyncTest, E2E_ENABLED(Race)) {
   ASSERT_TRUE(SamePasswordFormsChecker().Wait());
 }
 
-// Disabled due to flakiness on Chrome OS: https://crbug.com/873494.
-#if defined(OS_CHROMEOS)
-#define MAYBE_SetPassphraseAndAddPassword DISABLED_SetPassphraseAndAddPassword
-#else
-#define MAYBE_SetPassphraseAndAddPassword SetPassphraseAndAddPassword
-#endif
 IN_PROC_BROWSER_TEST_P(TwoClientPasswordsSyncTest,
-                       E2E_ENABLED(MAYBE_SetPassphraseAndAddPassword)) {
+                       E2E_ENABLED(SetPassphraseAndAddPassword)) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
 
   GetSyncService(0)->SetEncryptionPassphrase(kValidPassphrase);