Pass PopularSites ownership to MostVisitedSites.

components/ntp_tiles/most_visited_sites.cc

 // Copyright 2013 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_tiles/most_visited_sites.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 125 matching lines @@
   }
   NOTREACHED();
   return std::string();
 }
 
 }  // namespace
 
 MostVisitedSites::MostVisitedSites(PrefService* prefs,
                                    scoped_refptr<history::TopSites> top_sites,
                                    SuggestionsService* suggestions,
-                                   PopularSites* popular_sites,
+                                   std::unique_ptr<PopularSites> popular_sites,
                                    MostVisitedSitesSupervisor* supervisor)
     : prefs_(prefs),
       top_sites_(top_sites),
       suggestions_service_(suggestions),
-      popular_sites_(popular_sites),
+      popular_sites_(std::move(popular_sites)),
       supervisor_(supervisor),
       observer_(nullptr),
       num_sites_(0),
       waiting_for_most_visited_sites_(true),
       waiting_for_popular_sites_(true),
       recorded_uma_(false),
       top_sites_observer_(this),
       mv_source_(NTPTileSource::SUGGESTIONS_SERVICE),
       weak_ptr_factory_(this) {
   DCHECK(prefs_);
@@ skipping 382 matching lines @@
 
 void MostVisitedSites::TopSitesChanged(TopSites* top_sites,
                                        ChangeReason change_reason) {
   if (mv_source_ == NTPTileSource::TOP_SITES) {
     // The displayed tiles are invalidated.
     InitiateTopSitesQuery();
   }
 }
 
 }  // namespace ntp_tiles