Clear browsing data from ContentSuggestionService only if exists.

chrome/browser/browsing_data/browsing_data_remover.cc

Index: chrome/browser/browsing_data/browsing_data_remover.cc
diff --git a/chrome/browser/browsing_data/browsing_data_remover.cc b/chrome/browser/browsing_data/browsing_data_remover.cc
index aaf1e6074e4a670877882e04657f7ae74a704959..deb6fd57943b2b8c20bc7b25fe4420c8de9fcfc3 100644
--- a/chrome/browser/browsing_data/browsing_data_remover.cc
+++ b/chrome/browser/browsing_data/browsing_data_remover.cc
@@ -522,7 +522,7 @@ void BrowsingDataRemover::RemoveImpl(
     }
 
     ntp_snippets::ContentSuggestionsService* content_suggestions_service =
-        ContentSuggestionsServiceFactory::GetForProfile(profile_);
+        ContentSuggestionsServiceFactory::GetForProfileIfExists(profile_);
     if (content_suggestions_service) {
       content_suggestions_service->ClearHistory(delete_begin_, delete_end_,
                                                 filter);
@@ -1016,7 +1016,7 @@ void BrowsingDataRemover::RemoveImpl(
                    weak_ptr_factory_.GetWeakPtr()));
 
     ntp_snippets::ContentSuggestionsService* content_suggestions_service =
-        ContentSuggestionsServiceFactory::GetForProfile(profile_);
+        ContentSuggestionsServiceFactory::GetForProfileIfExists(profile_);
     if (content_suggestions_service)
       content_suggestions_service->ClearAllCachedSuggestions();
   }