Don't update unbound WebApks.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java
index b27cca610c0f763ef5635364b94efe625e78c0a6..b8581891c0b8fa60fbf0ebde01cc9ac6bfff6471 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkUpdateManager.java
@@ -4,6 +4,8 @@
 
 package org.chromium.chrome.browser.webapps;
 
+import static org.chromium.webapk.lib.common.WebApkConstants.WEBAPK_PACKAGE_PREFIX;
+
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
@@ -285,6 +287,10 @@ public class WebApkUpdateManager implements WebApkUpdateDataFetcher.Observer {
             return true;
         }
 
+        if (!info.webApkPackageName().startsWith(WEBAPK_PACKAGE_PREFIX)) {
+            return false;
+        }
+
         if (isShellApkVersionOutOfDate(info)
                 && WebApkVersion.CURRENT_SHELL_APK_VERSION
                         > mStorage.getLastRequestedShellApkVersion()) {