[NTP Snippets] Introduce ContentSuggestion::ID

components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc

Index: components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc
diff --git a/components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc b/components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc
index 202c03981c07f0612725f337588ca4647cc5902a..1a8da26199aba80a3206f4f778cbb1ead7fcc648 100644
--- a/components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc
+++ b/components/ntp_snippets/sessions/foreign_sessions_suggestions_provider_unittest.cc
@@ -150,7 +150,7 @@ class ForeignSessionsSuggestionsProviderTest : public Test {
 
   void Dismiss(const std::string& url) {
     // The url of a given suggestion is used as the |within_category_id|.
-    provider_->DismissSuggestion(provider_->MakeUniqueID(category(), url));
+    provider_->DismissSuggestion(ContentSuggestion::ID(category(), url));
   }
 
   Category category() {