Refactor password sync integration tests

sync/internal_api/sync_encryption_handler_impl.cc

Index: sync/internal_api/sync_encryption_handler_impl.cc
diff --git a/sync/internal_api/sync_encryption_handler_impl.cc b/sync/internal_api/sync_encryption_handler_impl.cc
index 34bf0335c8f6b31dbb010f1faf0472643442f665..d3dd33f773b78b5ca7725ea27b44297e02449fee 100644
--- a/sync/internal_api/sync_encryption_handler_impl.cc
+++ b/sync/internal_api/sync_encryption_handler_impl.cc
@@ -344,7 +344,6 @@ void SyncEncryptionHandlerImpl::SetEncryptionPassphrase(
   // encryption is to set a custom passphrase.
   if (IsNigoriMigratedToKeystore(node.GetNigoriSpecifics())) {
     if (!is_explicit) {
-      DCHECK(cryptographer->is_ready());
       // The user is setting a new implicit passphrase. At this point we don't
       // care, so drop it on the floor. This is safe because if we have a
       // migrated nigori node, then we don't need to create an initial