📰 Refresh the tiles when a removal is undone

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

Index: chrome/android/java/src/org/chromium/chrome/browser/suggestions/TileGroupDelegateImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/TileGroupDelegateImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/TileGroupDelegateImpl.java
index 3a3d8bd7d065aba3392d9dd2d18b93fccd93dbd0..5fc11397db77214f7bc2a781e6a69a8f521d5a67 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/suggestions/TileGroupDelegateImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/suggestions/TileGroupDelegateImpl.java
@@ -7,7 +7,9 @@
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build;
+import android.support.annotation.Nullable;
 
+import org.chromium.base.Callback;
 import org.chromium.base.CommandLine;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordUserAction;
@@ -53,11 +55,11 @@ public TileGroupDelegateImpl(ChromeActivity activity, Profile profile,
     }
 
     @Override
-    public void removeMostVisitedItem(Tile item) {
+    public void removeMostVisitedItem(Tile item, @Nullable Callback<String> removalUndoneCallback) {
         assert !mIsDestroyed;
 
         mMostVisitedSites.addBlacklistedUrl(item.getUrl());
-        showTileRemovedSnackbar(item.getUrl());
+        showTileRemovedSnackbar(item.getUrl(), removalUndoneCallback);
     }
 
     @Override
@@ -127,7 +129,8 @@ public static void setMostVisitedSitesForTests(MostVisitedSites mostVisitedSites
         sMostVisitedSitesForTests = mostVisitedSitesForTests;
     }
 
-    private void showTileRemovedSnackbar(String url) {
+    private void showTileRemovedSnackbar(
+            String url, @Nullable final Callback<String> removalUndoneCallback) {
         if (mTileRemovedSnackbarController == null) {
             mTileRemovedSnackbarController = new SnackbarController() {
                 @Override
@@ -138,6 +141,7 @@ public void onDismissNoAction(Object actionData) {}
                 public void onAction(Object actionData) {
                     if (mIsDestroyed) return;
                     String url = (String) actionData;
+                    if (removalUndoneCallback != null) removalUndoneCallback.onResult(url);
                     mMostVisitedSites.removeBlacklistedUrl(url);
                 }
             };