Upstream: Add additional checks before creating a WebAPK after clicking "Add to Homescreen"

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h

Index: chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
diff --git a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
index d02b94576e07aa3f981ee13c89db80f71d8d2554..7246b71572197abcbe3d33326838da759abdf4df 100644
--- a/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
+++ b/chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h
@@ -74,6 +74,16 @@ class AddToHomescreenDataFetcher
   void OnDidGetManifest(const GURL& manifest_url,
                         const content::Manifest& manifest);
 
+  // Called once it has been determined whether there is a service worker
+  // controlling the page. Only pages controlled by a service worker are
+  // WebAPK-capable.
+  void OnDidCheckServiceWorkerForWebApk(const content::Manifest& manifest,
+                                        bool has_service_worker);
+
+  // Called once it has been determined whether a WebAPK should be created for
+  // the page.
+  void OnCheckIsWebApk(const content::Manifest& manifest, bool is_webapk);
+
   // Accessors, etc.
   void set_weak_observer(Observer* observer) { weak_observer_ = observer; }
   bool is_ready() { return is_ready_; }
@@ -107,12 +117,19 @@ class AddToHomescreenDataFetcher
   // appropriate for a home screen shortcut.
   GURL GetShortcutUrl(const GURL& original_url);
 
+  // Returns whether a WebAPK can be built for |manifest|.
+  bool IsManifestWebApkCapable(const content::Manifest& manifest) const;
+
   Observer* weak_observer_;
 
   bool is_waiting_for_web_application_info_;
   bool is_icon_saved_;
   bool is_ready_;
   base::Timer icon_timeout_timer_;
+
+  // The web page's current URL.
+  GURL shortcut_url_;
+
   ShortcutInfo shortcut_info_;
   GURL splash_screen_url_;