Update WebAPKs even if the WebAPK start URL has no Web Manifest

chrome/browser/android/webapk/webapk_update_data_fetcher.h

Index: chrome/browser/android/webapk/webapk_update_data_fetcher.h
diff --git a/chrome/browser/android/webapk/webapk_update_data_fetcher.h b/chrome/browser/android/webapk/webapk_update_data_fetcher.h
index 6bc7885f5a5d96ad75d92af2e0004670f0093f5a..03f3dac3f35a10f28e4cd857265ed563848602ff 100644
--- a/chrome/browser/android/webapk/webapk_update_data_fetcher.h
+++ b/chrome/browser/android/webapk/webapk_update_data_fetcher.h
@@ -68,6 +68,10 @@ class WebApkUpdateDataFetcher : public content::WebContentsObserver {
                        const std::string& best_icon_murmur2_hash,
                        const SkBitmap& best_icon);
 
+  // Called when a page has no Web Manifest or the Web Manifest is not WebAPK
+  // compatible.
+  void OnWebManifestNotWebApkCompatible();
+
   // Points to the Java object.
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
@@ -77,6 +81,9 @@ class WebApkUpdateDataFetcher : public content::WebContentsObserver {
   // The WebAPK's Web Manifest URL that the detector is looking for.
   const GURL web_manifest_url_;
 
+  // Whether this is the initial URL fetch.
+  bool is_initial_fetch_;
+
   // The URL for which the installable data is being fetched / was last fetched.
   GURL last_fetched_url_;