Make bookmark suggestions dismissable

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.cc

 // 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.
 
 #include "components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 48 matching lines @@
   return std::vector<Category>({provided_category_});
 }
 
 CategoryStatus BookmarkSuggestionsProvider::GetCategoryStatus(
     Category category) {
   return category_status_;
 }
 
 void BookmarkSuggestionsProvider::DismissSuggestion(
     const std::string& suggestion_id) {
-  // TODO(jkrcal): Implement blacklisting bookmarks until they are next visited.
-  // Then also implement ClearDismissedSuggestionsForDebugging.
+  DCHECK(bookmark_model_->loaded());
+  GURL url(GetWithinCategoryIDFromUniqueID(suggestion_id));
+  MarkBookmarksDismissed(bookmark_model_, url);
 }
 
 void BookmarkSuggestionsProvider::FetchSuggestionImage(
     const std::string& suggestion_id,
     const ImageFetchedCallback& callback) {
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(callback, suggestion_id, gfx::Image()));
 }
 
 void BookmarkSuggestionsProvider::ClearCachedSuggestionsForDebugging() {
   // Ignored.
 }
 
 void BookmarkSuggestionsProvider::ClearDismissedSuggestionsForDebugging() {
-  // TODO(jkrcal): Implement when discarded suggestions are supported.
+  if (!bookmark_model_->loaded())
+    return;
+  MarkAllBookmarksUndismissed(bookmark_model_);
 }
 
 void BookmarkSuggestionsProvider::BookmarkModelLoaded(
     bookmarks::BookmarkModel* model,
     bool ids_reassigned) {
   DCHECK_EQ(bookmark_model_, model);
   if (fetch_requested_) {
     fetch_requested_ = false;
     FetchBookmarksInternal();
   }
@@ skipping 58 matching lines @@
 
 void BookmarkSuggestionsProvider::NotifyStatusChanged(
     CategoryStatus new_status) {
   if (category_status_ == new_status)
     return;
   category_status_ = new_status;
   observer()->OnCategoryStatusChanged(this, provided_category_, new_status);
 }
 
 }  // namespace ntp_snippets