Disable ProfileKeyedServices on import process by default.

chrome/browser/bookmarks/bookmark_model_factory.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 "chrome/browser/bookmarks/bookmark_model_factory.h"
 
 #include "base/memory/singleton.h"
 #include "base/values.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 42 matching lines @@
 }
 
 bool BookmarkModelFactory::ServiceRedirectedInIncognito() const {
   return true;
 }
 
 bool BookmarkModelFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
+bool BookmarkModelFactory::ServiceIsNULLOnImportProcess() const {
+  return false;
+}
+
 // static
 BookmarkService* BookmarkService::FromBrowserContext(
     content::BrowserContext* browser_context) {
   return BookmarkModelFactory::GetForProfile(
       Profile::FromBrowserContext(browser_context));
 }