Support action button to fetch more content suggestions

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 74 matching lines @@
 
 CategoryStatus BookmarkSuggestionsProvider::GetCategoryStatus(
     Category category) {
   DCHECK_EQ(category, provided_category_);
   return category_status_;
 }
 
 CategoryInfo BookmarkSuggestionsProvider::GetCategoryInfo(Category category) {
   return CategoryInfo(
       l10n_util::GetStringUTF16(IDS_NTP_BOOKMARK_SUGGESTIONS_SECTION_HEADER),
-      ContentSuggestionsCardLayout::MINIMAL_CARD);
+      ContentSuggestionsCardLayout::MINIMAL_CARD, true);
+}
+
+void BookmarkSuggestionsProvider::FetchMoreSuggestions(Category category) {
+  // Ignored.

[Marc Treib, 2016/08/10 09:40:31]

NOTREACHED()
since we don't expect this to get called?

[Philipp Keck, 2016/08/10 13:14:46]

No. We will have global reload actions. Currently that's only *maybe* through
the status card, depending on UX decisions. But after M54 we will introduce a
global refresh actions that just needs to go out to all providers. So this must
ignore, not fail.

[Marc Treib, 2016/08/10 13:19:04]

But "refresh" is not quite the same as "fetch more".

[Philipp Keck, 2016/08/10 15:16:41]

True. I removed the whole FetchMoreSuggestions thing for now, as it won't be
used. Lots of ignore methods and such will just be confusing for M54. Will add
it back in after the feature freeze.

 }
 
 void BookmarkSuggestionsProvider::DismissSuggestion(
     const std::string& suggestion_id) {
   DCHECK(bookmark_model_->loaded());
   GURL url(GetWithinCategoryIDFromUniqueID(suggestion_id));
   MarkBookmarksDismissed(bookmark_model_, url);
 }
 
 void BookmarkSuggestionsProvider::FetchSuggestionImage(
@@ skipping 104 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