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

chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_
 #define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/task/cancelable_task_tracker.h"
@@ skipping 55 matching lines @@
   // Returns a callback which fetches the splash screen image to be stored for
   // the webapp with the specified |id|.
   base::Closure FetchSplashScreenImageCallback(const std::string& id);
 
   // IPC message received when the initialization is finished.
   void OnDidGetWebApplicationInfo(const WebApplicationInfo& web_app_info);
 
   // Called when the Manifest has been parsed, or if no Manifest was found.
   void OnDidGetManifest(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_; }
   ShortcutInfo& shortcut_info() { return shortcut_info_; }
   const SkBitmap& shortcut_icon() { return shortcut_icon_; }
 
   // WebContentsObserver
   bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
@@ skipping 13 matching lines @@
   void OnManifestIconFetched(const SkBitmap& icon);
 
   // Notifies the observer that the shortcut data is all available.
   void NotifyObserver(const SkBitmap& icon, bool is_generated);
 
   // Looks up the original, online URL of the site requested.  The URL from the
   // WebContents may be an offline page or a distilled article which is not
   // 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_;
 
   // The icon must only be set on the UI thread for thread safety.
   SkBitmap shortcut_icon_;
   base::CancelableTaskTracker favicon_task_tracker_;
 
   const int ideal_icon_size_in_dp_;
   const int minimum_icon_size_in_dp_;
   const int ideal_splash_image_size_in_dp_;
   const int minimum_splash_image_size_in_dp_;
 
   friend class base::RefCounted<AddToHomescreenDataFetcher>;
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDataFetcher);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_