[NTP Snippets] Clean up NTPSnippetsFetcher

components/ntp_snippets/remote/ntp_snippets_service.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 "components/ntp_snippets/remote/ntp_snippets_service.h"
 
 #include <algorithm>
 #include <iterator>
 #include <utility>
 
@@ skipping 236 matching lines @@
     return;
 
   // Empty categories are marked as loading; others are unchanged.
   for (const auto& item : categories_) {
     Category category = item.first;
     const CategoryContent& content = item.second;
     if (content.snippets.empty())
       UpdateCategoryStatus(category, CategoryStatus::AVAILABLE_LOADING);
   }
 
-  std::set<std::string> excluded_ids;
+  NTPSnippetsFetcher::Params params;
+  params.language_code = application_language_code_;
+  params.count_to_fetch = kMaxSnippetCount;
+  params.hosts = hosts;
+  params.interactive_request = interactive_request;
   for (const auto& item : categories_) {
     const CategoryContent& content = item.second;
     for (const auto& snippet : content.dismissed)
-      excluded_ids.insert(snippet->id());
+      params.excluded_ids.insert(snippet->id());
   }
-  snippets_fetcher_->FetchSnippetsFromHosts(hosts, application_language_code_,
-                                            excluded_ids, kMaxSnippetCount,
-                                            interactive_request);
+  snippets_fetcher_->FetchSnippets(params);
 }
 
 void NTPSnippetsService::RescheduleFetching(bool force) {
   // The scheduler only exists on Android so far, it's null on other platforms.
   if (!scheduler_)
     return;
 
   if (ready()) {
     base::TimeDelta old_interval_wifi =
         base::TimeDelta::FromInternalValue(pref_service_->GetInt64(
@@ skipping 834 matching lines @@
 }
 
 NTPSnippetsService::CategoryContent::CategoryContent() = default;
 NTPSnippetsService::CategoryContent::CategoryContent(CategoryContent&&) =
     default;
 NTPSnippetsService::CategoryContent::~CategoryContent() = default;
 NTPSnippetsService::CategoryContent& NTPSnippetsService::CategoryContent::
 operator=(CategoryContent&&) = default;
 
 }  // namespace ntp_snippets