📰 Refactor SuggestionsSection change detection

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/ProgressItem.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/ProgressItem.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/ProgressItem.java
index 788aa7f6f55b0bd031b8a82ef5e9c0766a16542f..a031edf5b6aea659d278194086547c6a294a3b12 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/ProgressItem.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/ProgressItem.java
@@ -10,8 +10,10 @@
  *
  * @see ProgressViewHolder
  */
-class ProgressItem extends Leaf {
-    private boolean mVisible = false;
+class ProgressItem extends OptionalLeaf {
+    protected ProgressItem(NodeParent parent) {
+        super(parent);
+    }
 
     @Override
     @ItemViewType
@@ -19,14 +21,6 @@ protected int getItemViewType() {
         return ItemViewType.PROGRESS;
     }
 
-    public boolean isVisible() {
-        return mVisible;
-    }
-
-    public void setVisible(boolean visible) {
-        mVisible = visible;
-    }
-
     @Override
     protected void onBindViewHolder(NewTabPageViewHolder holder) {
         assert holder instanceof ProgressViewHolder;