Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/core/background/cleanup_task_factory.cc

 // Copyright 2016 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/offline_pages/background/cleanup_task_factory.h"
+#include "components/offline_pages/core/background/cleanup_task_factory.h"
 
-#include "components/offline_pages/background/offliner_policy.h"
-#include "components/offline_pages/background/request_coordinator_event_logger.h"
-#include "components/offline_pages/background/request_notifier.h"
+#include "components/offline_pages/core/background/offliner_policy.h"
+#include "components/offline_pages/core/background/request_coordinator_event_logger.h"
+#include "components/offline_pages/core/background/request_notifier.h"
 
 namespace offline_pages {
 
 // Capture the common parameters that we will need to make a pick task,
 // and use them when making tasks.  Create this once each session, and
 // use it to build a picker task when needed.
 CleanupTaskFactory::CleanupTaskFactory(
     OfflinerPolicy* policy,
     RequestNotifier* notifier,
     RequestCoordinatorEventLogger* event_logger)
     : policy_(policy), notifier_(notifier), event_logger_(event_logger) {
   DCHECK(policy);
   DCHECK(notifier);
   DCHECK(event_logger);
 }
 
 CleanupTaskFactory::~CleanupTaskFactory() {}
 
 std::unique_ptr<CleanupTask> CleanupTaskFactory::CreateCleanupTask(
     RequestQueueStore* store) {
   std::unique_ptr<CleanupTask> task(
       new CleanupTask(store, policy_, notifier_, event_logger_));
   return task;
 }
 
 }  // namespace offline_pages