[NTP Snippets] Stop showing snippet cards with wrong thumbnails

chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java
index 89f8093f30e57bdeb7a08fca9dc141c1283dedf7..7d99986fe6f1df09a45022777b0ac8074a927bc2 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetArticle.java
@@ -44,6 +44,11 @@
 
         ThumbnailRenderingTask(ImageView thumbnailView) {
             mThumbnailView = thumbnailView;
+
+            // The view might be already holding the thumbnail from another snippet, as the view
+            // is recycled. We start by hiding it to avoid having a stale image be displayed while
+            // the new one is being downloaded.
+            mThumbnailView.setVisibility(View.INVISIBLE);
         }
 
         @Override