📰 Check we are on the NTP after dismissal animation.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerView.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerView.java
index 525d1012f8e008cec76371f8536bbc01e3d5e9fa..5a8c9c0df7e227113e632ac53736f7e54a2e2da7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/NewTabPageRecyclerView.java
@@ -12,6 +12,7 @@
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.Region;
+import android.support.v4.view.ViewCompat;
 import android.support.v4.view.animation.FastOutLinearInInterpolator;
 import android.support.v4.view.animation.LinearOutSlowInInterpolator;
 import android.support.v7.widget.LinearLayoutManager;
@@ -541,6 +542,10 @@ public void onAnimationStart(Animator animation) {
 
             @Override
             public void onAnimationEnd(Animator animation) {
+                // It is possible that by the time the animation ends, we navigated away from the
+                // container and it got destroyed. In that case, abort. (https://crbug.com/668945)
+                if (!ViewCompat.isAttachedToWindow(viewHolder.itemView)) return;
+
                 dismissItemInternal(viewHolder);
                 NewTabPageRecyclerView.this.onItemDismissFinished(viewHolder);
             }