Update WebAPK after the user closes WebAPK

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java
index 36352c12d96fffb8d938aa8815ccf82b8672a75c..3cd7fbd6c895e79e8061e240f84f470b88769ac3 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappRegistry.java
@@ -8,6 +8,7 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.os.AsyncTask;
+import android.text.TextUtils;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.VisibleForTesting;
@@ -17,9 +18,11 @@ import org.chromium.chrome.browser.browsing_data.UrlFilter;
 import org.chromium.chrome.browser.browsing_data.UrlFilterBridge;
 import org.chromium.webapk.lib.common.WebApkConstants;
 
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
@@ -168,6 +171,18 @@ public class WebappRegistry {
         return bestMatch;
     }
 
+    /** Returns the list of WebAPK IDs with pending updates. */
+    public List<String> findWebApksWithPendingUpdate() {
+        ArrayList<String> webApkIdsWithPendingUpdate = new ArrayList<String>();
+        for (HashMap.Entry<String, WebappDataStorage> entry : mStorages.entrySet()) {
+            WebappDataStorage storage = entry.getValue();
+            if (!TextUtils.isEmpty(storage.getPendingUpdateRequestPath())) {
+                webApkIdsWithPendingUpdate.add(entry.getKey());
+            }
+        }
+        return webApkIdsWithPendingUpdate;
+    }
+
     /**
      * Returns the list of web app IDs which are written to SharedPreferences.
      */