Update AutoImport to import nothing by default (in absence of policy and master_prefs).

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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/prefs/browser_prefs.h"
 
 #include <string>
 
 #include "base/files/file_util.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 563 matching lines @@
   ContentSuggestionsNotifierService::RegisterProfilePrefs(registry);
   DownloadSuggestionsProvider::RegisterProfilePrefs(registry);
   ntp_snippets::ClickBasedCategoryRanker::RegisterProfilePrefs(registry);
   ntp_snippets::PhysicalWebPageSuggestionsProvider::RegisterProfilePrefs(
       registry);
   ntp_snippets::RecentTabSuggestionsProvider::RegisterProfilePrefs(registry);
 #endif  // defined(OS_ANDROID)
 
 #if !defined(OS_ANDROID)
   browser_sync::ForeignSessionHandler::RegisterProfilePrefs(registry);
+  first_run::RegisterProfilePrefs(registry);
   gcm::GCMChannelStatusSyncer::RegisterProfilePrefs(registry);
   gcm::RegisterProfilePrefs(registry);
   StartupBrowserCreator::RegisterProfilePrefs(registry);
 #endif
 
 #if !defined(OS_ANDROID) && !defined(OS_CHROMEOS)
   default_apps::RegisterProfilePrefs(registry);
 #endif
 
 #if defined(OS_CHROMEOS)
@@ skipping 189 matching lines @@
     if (distro_dict &&
         distro_dict->GetInteger(kDistroRlzPingDelay, &rlz_ping_delay)) {
       profile_prefs->SetInteger(prefs::kRlzPingDelaySeconds, rlz_ping_delay);
     }
 #endif  // BUILDFLAG(ENABLE_RLZ)
     profile_prefs->ClearPref(kDistroDict);
   }
 }
 
 }  // namespace chrome