[NTP Snippets] Schedule periodic fetching

chrome/browser/ntp_snippets/ntp_snippets_service_factory.cc

 // Copyright 2015 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/ntp_snippets/ntp_snippets_service_factory.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
+#include "chrome/browser/android/ntp_snippets_launcher.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/ntp_snippets/ntp_snippets_fetcher.h"
 #include "components/ntp_snippets/ntp_snippets_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 30 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> request_context =
       context->GetRequestContext();
 
   scoped_refptr<base::SequencedTaskRunner> task_runner =
       BrowserThread::GetBlockingPool()
           ->GetSequencedTaskRunnerWithShutdownBehavior(
               base::SequencedWorkerPool::GetSequenceToken(),
               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
   return new ntp_snippets::NTPSnippetsService(
       task_runner, g_browser_process->GetApplicationLocale(),
+      NTPSnippetsLauncher::Get(),
       make_scoped_ptr(new ntp_snippets::NTPSnippetsFetcher(
           task_runner, signin_manager, token_service, request_context.get())));
 }