Use the same design for all suggestions

components/ntp_snippets/content_suggestion.h

 // 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.
 
 #ifndef COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTION_H_
 #define COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTION_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 31 matching lines @@
 struct RecentTabSuggestionExtra {
   // Corresponding tab identifier.
   int tab_id;
   // Underlying offline page identifier.
   int64_t offline_page_id = 0;
 };
 
 // ReadingListSuggestionExtra contains additional data which is only available
 // for Reading List suggestions.
 struct ReadingListSuggestionExtra {
-  // State of the distillation a suggestion. This is the meaningful extract of
-  // ReadingListEntry::DistillationState for the suggestions. It is duplicated
-  // here to avoid a dependence on ReadingList.
-  enum class ReadingListSuggestionDistilledState { PENDING, SUCCESS, FAILURE };
-
   // State of the distillation of the suggestion.
-  ReadingListSuggestionDistilledState distilled_state =
-      ReadingListSuggestionDistilledState::PENDING;
+  bool distilled = false;
   // URL of the page whose favicon should be displayed for this suggestion.
   GURL favicon_page_url;
 };
 
 // Contains additional data for notification-worthy suggestions.
 struct NotificationExtra {
   // Deadline for showing notification. If the deadline is past, the
   // notification is no longer fresh and no notification should be sent. If the
   // deadline passes while a notification is up, it should be canceled.
   base::Time deadline;
@@ skipping 146 matching lines @@
   base::Time fetch_date_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSuggestion);
 };
 
 std::ostream& operator<<(std::ostream& os, const ContentSuggestion::ID& id);
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTION_H_