[NTP Snippets] Cleanups from clang-tidy

components/ntp_snippets/sessions/foreign_sessions_suggestions_provider.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/ntp_snippets/sessions/foreign_sessions_suggestions_provider.h"
 
 #include <algorithm>
 #include <map>
 #include <tuple>
 #include <utility>
@@ skipping 81 matching lines @@
       foreign_sessions_provider_(std::move(foreign_sessions_provider)),
       pref_service_(pref_service) {
   foreign_sessions_provider_->SubscribeForForeignTabChange(
       base::Bind(&ForeignSessionsSuggestionsProvider::OnForeignTabChange,
                  base::Unretained(this)));
 
   // If sync is already initialzed, try suggesting now, though this is unlikely.
   OnForeignTabChange();
 }
 
-ForeignSessionsSuggestionsProvider::~ForeignSessionsSuggestionsProvider() {}
+ForeignSessionsSuggestionsProvider::~ForeignSessionsSuggestionsProvider() =
+    default;
 
 // static
 void ForeignSessionsSuggestionsProvider::RegisterProfilePrefs(
     PrefRegistrySimple* registry) {
   registry->RegisterListPref(prefs::kDismissedForeignSessionsSuggestions);
 }
 
 CategoryStatus ForeignSessionsSuggestionsProvider::GetCategoryStatus(
     Category category) {
   DCHECK_EQ(category, provided_category_);
@@ skipping 192 matching lines @@
   // This field is sandwiched between the url's favicon, which is on the left,
   // and the |publish_date|, which is to the right. The domain should always
   // appear next to the favicon.
   suggestion.set_publisher_name(
       base::UTF8ToUTF16(data.navigation->virtual_url().host() + " - " +
                         data.session->session_name));
   return suggestion;
 }
 
 }  // namespace ntp_snippets