Fix crash during profile shutdown

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index 3f2b821d82c6862daad73ba322c66c861d8e56a8..abbcf2890b28140dfa42a405e15e1c599546fb11 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -232,6 +232,7 @@ ProfileImpl::ProfileImpl(const FilePath& path,
       extension_devtools_manager_(NULL),
       host_content_settings_map_(NULL),
       host_zoom_map_(NULL),
+      profile_sync_service_created_(false),
       history_service_created_(false),
       favicon_service_created_(false),
       created_web_data_service_(false),
@@ -1387,8 +1388,10 @@ ProfileSyncService* ProfileImpl::GetProfileSyncService(
 
   if (!ProfileSyncService::IsSyncEnabled())
     return NULL;
-  if (!sync_service_.get())
+  if (!profile_sync_service_created_) {
+    profile_sync_service_created_ = true;
     InitSyncService(cros_user);
+  }
   return sync_service_.get();
 }