📰 Record the first scroll event on the recycler view

chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java
index 6fee021f1dbe666966096a836c11f9ccc1e79392..34112051256d3c1f15ff2177e57cae81f4a669b6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/SuggestionsRecyclerView.java
@@ -59,6 +59,7 @@
 
     private final GestureDetector mGestureDetector;
     private final LinearLayoutManager mLayoutManager;
+    private final SuggestionsMetrics.ScrollEventReporter mScrollEventReporter;
 
     /**
      * Total height of the items being dismissed.  Tracked to allow the bottom space to compensate
@@ -114,6 +115,9 @@ public boolean onSingleTapUp(MotionEvent e) {
 
         ItemTouchHelper helper = new ItemTouchHelper(new ItemTouchCallbacks());
         helper.attachToRecyclerView(this);
+
+        mScrollEventReporter = new SuggestionsMetrics.ScrollEventReporter();
+        addOnScrollListener(mScrollEventReporter);
     }
 
     public boolean isFirstItemVisible() {
@@ -325,6 +329,10 @@ public int getCompensationHeight() {
         return mCompensationHeight;
     }
 
+    public SuggestionsMetrics.ScrollEventReporter getScrollEventReporter() {
+        return mScrollEventReporter;
+    }
+
     private class ItemTouchCallbacks extends ItemTouchHelper.Callback {
         @Override
         public void onSwiped(ViewHolder viewHolder, int direction) {