[Sync] Stop purging sync data on restart for users who haven't finished setup.

components/browser_sync/browser/profile_sync_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/browser_sync/browser/profile_sync_service.h"
 
 #include <stddef.h>
 #include <cstddef>
 #include <map>
 #include <utility>
@@ skipping 339 matching lines @@
 
   // If sync isn't allowed, the only thing to do is to turn it off.
   if (!IsSyncAllowed()) {
     // Only clear data if disallowed by policy.
     RequestStop(IsManaged() ? CLEAR_DATA : KEEP_DATA);
     return;
   }
 
   RegisterAuthNotifications();
 
-  if (!IsFirstSetupComplete() || !IsSignedIn()) {
-    // Clean up in case of previous crash / setup abort / signout.
+  if (!IsSignedIn()) {
+    // Clean up in case of previous crash during signout.
     StopImpl(CLEAR_DATA);
   }
 
 #if defined(OS_CHROMEOS)
   std::string bootstrap_token = sync_prefs_.GetEncryptionBootstrapToken();
   if (bootstrap_token.empty()) {
     sync_prefs_.SetEncryptionBootstrapToken(
         sync_prefs_.GetSpareBootstrapToken());
   }
 #endif
@@ skipping 2154 matching lines @@
   if (--outstanding_setup_in_progress_handles_ != 0)
     return;
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsBackendInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }