[NTP::SectionOrder] Propagate category rank from UI through the bridge.

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 71b7d4b494b5467d5516b4dd1e75fa1cd1ebb60c..8cf0b486f116b90cf3aedd09a0263116ad47d275 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
@@ -73,6 +73,7 @@ public class SuggestionsSection extends InnerNode {
         private final List<SnippetArticle> mSuggestions = new ArrayList<>();
         private final NewTabPageManager mNewTabPageManager;
         private final SuggestionsCategoryInfo mCategoryInfo;
+        private int mCategoryRank;
 
         public SuggestionsList(NewTabPageManager newTabPageManager,
                 SuggestionsCategoryInfo categoryInfo) {
@@ -80,6 +81,14 @@ public class SuggestionsSection extends InnerNode {
             mCategoryInfo = categoryInfo;
         }
 
+        public void setCategoryRank(int categoryRank) {
+            mCategoryRank = categoryRank;
+        }
+
+        public int getCategoryRank() {
+            return mCategoryRank;
+        }
+
         @Override
         public int getItemCount() {
             return mSuggestions.size();
@@ -98,7 +107,8 @@ public class SuggestionsSection extends InnerNode {
             checkIndex(position);
             assert holder instanceof SnippetArticleViewHolder;
             ((SnippetArticleViewHolder) holder)
-                    .onBindViewHolder(getSuggestionAt(position), mCategoryInfo, payloads);
+                    .onBindViewHolder(
+                            getSuggestionAt(position), mCategoryInfo, payloads, mCategoryRank);
         }
 
         @Override
@@ -354,6 +364,14 @@ public class SuggestionsSection extends InnerNode {
         return mCategoryInfo;
     }
 
+    public int getCategoryRank() {
+        return mSuggestionsList.getCategoryRank();
+    }
+
+    public void setCategoryRank(int categoryRank) {
+        mSuggestionsList.setCategoryRank(categoryRank);
+    }
+
     public String getHeaderText() {
         return mHeader.getHeaderText();
     }