[Remote suggestions] Move all decisions to fetch to the scheduler

ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_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 "ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.h"
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ptr_util.h"
@@ skipping 156 matching lines @@
         service->category_ranker(), std::move(suggestions_fetcher),
         base::MakeUnique<ImageFetcherImpl>(
             CreateIOSImageDecoder(web::WebThread::GetBlockingPool()),
             request_context.get()),
         CreateIOSImageDecoder(task_runner),
         base::MakeUnique<RemoteSuggestionsDatabase>(database_dir, task_runner),
         base::MakeUnique<RemoteSuggestionsStatusService>(signin_manager,
                                                          prefs));
 
     // TODO(jkrcal): Implement a persistent scheduler for iOS. crbug.com/676249
+    RemoteSuggestionsProviderImpl* provider_raw = provider.get();
     auto scheduling_provider =
         base::MakeUnique<SchedulingRemoteSuggestionsProvider>(
             service.get(), std::move(provider),
             /*persistent_scheduler=*/nullptr, service->user_classifier(), prefs,
             base::MakeUnique<base::DefaultClock>());
+    provider_raw->SetRemoteSuggestionsScheduler(scheduling_provider.get());
     service->set_remote_suggestions_provider(scheduling_provider.get());
     service->set_remote_suggestions_scheduler(scheduling_provider.get());
     service->RegisterProvider(std::move(scheduling_provider));
   }
 
   return std::move(service);
 }