[NTP Snippets] Introduce ContentSuggestion::ID

components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc

Index: components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc
diff --git a/components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc b/components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc
index 22dd7ede33d31beaee5f367659786e8f54f46c57..b87f20ed039dd8b6f1ccc0fd813e5b23e660280d 100644
--- a/components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc
+++ b/components/ntp_snippets/physical_web_pages/physical_web_page_suggestions_provider.cc
@@ -45,9 +45,8 @@ void PhysicalWebPageSuggestionsProvider::OnDisplayableUrlsChanged(
   for (const UrlInfo& url_info : urls) {
     if (suggestions.size() >= kMaxSuggestionsCount) break;
 
-    ContentSuggestion suggestion(
-        MakeUniqueID(provided_category_, url_info.site_url.spec()),
-        url_info.site_url);
+    ContentSuggestion suggestion(provided_category_, url_info.site_url.spec(),
+                                 url_info.site_url);
 
     suggestion.set_title(base::UTF8ToUTF16(url_info.title));
     suggestion.set_snippet_text(base::UTF8ToUTF16(url_info.description));
@@ -75,13 +74,14 @@ CategoryInfo PhysicalWebPageSuggestionsProvider::GetCategoryInfo(
 }
 
 void PhysicalWebPageSuggestionsProvider::DismissSuggestion(
-    const std::string& suggestion_id) {
+    const ContentSuggestion::ID& suggestion_id) {
   // TODO(vitaliii): Implement this and then
   // ClearDismissedSuggestionsForDebugging.
 }
 
 void PhysicalWebPageSuggestionsProvider::FetchSuggestionImage(
-    const std::string& suggestion_id, const ImageFetchedCallback& callback) {
+    const ContentSuggestion::ID& suggestion_id,
+    const ImageFetchedCallback& callback) {
   // TODO(vitaliii): Implement.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(callback, gfx::Image()));