📰 Implement offline badge refresh via partial bind

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
index b83ab1dfb013cf53a32f5caf8ef2aadc21bdf81d..71b7d4b494b5467d5516b4dd1e75fa1cd1ebb60c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SuggestionsSection.java
@@ -93,11 +93,12 @@ public int getItemViewType(int position) {
         }
 
         @Override
-        public void onBindViewHolder(NewTabPageViewHolder holder, int position) {
+        public void onBindViewHolder(
+                NewTabPageViewHolder holder, int position, List<Object> payloads) {
             checkIndex(position);
             assert holder instanceof SnippetArticleViewHolder;
             ((SnippetArticleViewHolder) holder)
-                    .onBindViewHolder(getSuggestionAt(position), mCategoryInfo);
+                    .onBindViewHolder(getSuggestionAt(position), mCategoryInfo, payloads);
         }
 
         @Override
@@ -155,6 +156,15 @@ public void dismissItem(int position, Callback<String> itemRemovedCallback) {
             suggestionsSource.dismissSuggestion(suggestion);
             itemRemovedCallback.onResult(suggestion.mTitle);
         }
+
+        public void updateSuggestionOfflineId(SnippetArticle article, Long newId) {
+            Long oldId = article.getOfflinePageOfflineId();
+            article.setOfflinePageOfflineId(newId);
+
+            if ((oldId == null) == (newId == null)) return;
+            notifyItemChanged(mSuggestions.indexOf(article),
+                    SnippetArticleViewHolder.PARTIAL_UPDATE_OFFLINE_ID);
+        }
     }
 
     private void setupOfflinePageBridgeObserver(NewTabPageManager manager) {
@@ -286,11 +296,8 @@ private void updateSnippetOfflineAvailability(final SnippetArticle article) {
                     @Override
                     public void onResult(OfflinePageItem item) {
                         if (mIsNtpDestroyed) return;
-                        if (item == null) {
-                            article.setOfflinePageOfflineId(null);
-                            return;
-                        }
-                        article.setOfflinePageOfflineId(item.getOfflineId());
+                        mSuggestionsList.updateSuggestionOfflineId(
+                                article, item == null ? null : item.getOfflineId());
                     }
                 });
     }