Use the manifest start URL to query the existence of a WebAPK

chrome/browser/android/banners/app_banner_infobar_delegate_android.cc

Index: chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
diff --git a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
index b9ccb59699fc5c3e8a89f18c1842c1dc349d5327..21d68dff1e18ac4c5d0f60aed2927ded7a766667 100644
--- a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
+++ b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
@@ -56,12 +56,10 @@ bool AppBannerInfoBarDelegateAndroid::Create(
     webapk::InstallSource webapk_install_source) {
   bool is_webapk = ChromeWebApkHost::AreWebApkEnabled();
   std::string webapk_package_name = "";
-  if (is_webapk) {
-    webapk_package_name = ShortcutHelper::QueryWebApkPackage(
-        web_contents->GetLastCommittedURL());
-  }
-  bool is_webapk_already_installed = !webapk_package_name.empty();
   const GURL& url = shortcut_info->url;
+  if (is_webapk)
+    webapk_package_name = ShortcutHelper::QueryWebApkPackage(url);
+  bool is_webapk_already_installed = !webapk_package_name.empty();
   auto infobar_delegate =
       base::WrapUnique(new banners::AppBannerInfoBarDelegateAndroid(
           weak_manager, app_title, std::move(shortcut_info), std::move(icon),