[NTP::Cleanup] Avoid nested complex function calls

chrome/browser/ntp_snippets/content_suggestions_service_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 "chrome/browser/ntp_snippets/content_suggestions_service_factory.h"
 
 #include <utility>
 
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
@@ skipping 153 matching lines @@
 
   base::FilePath database_dir(
       profile->GetPath().Append(ntp_snippets::kDatabaseFolder));
   scoped_refptr<base::SequencedTaskRunner> task_runner =
       BrowserThread::GetBlockingPool()
           ->GetSequencedTaskRunnerWithShutdownBehavior(
               base::SequencedWorkerPool::GetSequenceToken(),
               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
   bool is_stable_channel =
       chrome::GetChannel() == version_info::Channel::STABLE;
+  auto suggestions_fetcher = base::MakeUnique<RemoteSuggestionsFetcher>(
+      signin_manager, token_service, request_context, pref_service,
+      language_model, base::Bind(&safe_json::SafeJsonParser::Parse),
+      is_stable_channel ? google_apis::GetAPIKey()
+                        : google_apis::GetNonStableAPIKey(),
+      service->user_classifier());
   auto provider = base::MakeUnique<RemoteSuggestionsProviderImpl>(
       service, pref_service, g_browser_process->GetApplicationLocale(),
-      service->category_ranker(),
-      base::MakeUnique<RemoteSuggestionsFetcher>(
-          signin_manager, token_service, request_context, pref_service,
-          language_model, base::Bind(&safe_json::SafeJsonParser::Parse),
-          is_stable_channel ? google_apis::GetAPIKey()
-                            : google_apis::GetNonStableAPIKey(),
-          service->user_classifier()),
+      service->category_ranker(), std::move(suggestions_fetcher),
       base::MakeUnique<ImageFetcherImpl>(base::MakeUnique<ImageDecoderImpl>(),
                                          request_context.get()),
       base::MakeUnique<ImageDecoderImpl>(),
       base::MakeUnique<RemoteSuggestionsDatabase>(database_dir, task_runner),
       base::MakeUnique<RemoteSuggestionsStatusService>(signin_manager,
                                                        pref_service));
 
   PersistentScheduler* scheduler = nullptr;
 #if defined(OS_ANDROID)
   scheduler = NTPSnippetsLauncher::Get();
@@ skipping 130 matching lines @@
                             language_model, pref_service, profile);
   }
 
   if (base::FeatureList::IsEnabled(
           ntp_snippets::kForeignSessionsSuggestionsFeature)) {
     RegisterForeignSessionsProvider(sync_service, service, pref_service);
   }
 
   return service;
 }