Store standalone web app data in WebappDataStorage as well as the homescreen intent.

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"
 #include "base/timer/timer.h"
 #include "chrome/browser/android/shortcut_info.h"
 #include "chrome/common/web_application_info.h"
 #include "components/favicon_base/favicon_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/manifest.h"
 
 namespace content {
@@ skipping 37 matching lines @@
   // Initialize the fetcher by requesting the information about the page to the
   // renderer process. The initialization is asynchronous and
   // OnDidGetWebApplicationInfo is expected to be called when finished.
   AddToHomescreenDataFetcher(content::WebContents* web_contents,
                              int ideal_icon_size_in_dp,
                              int minimum_icon_size_in_dp,
                              int ideal_splash_image_size_in_dp,
                              int minimum_splash_image_size_in_dp,
                              Observer* observer);
 
-  // Called to fetch the splash screen image to be stored for the webapp with
-  // the specified |id|.
-  void FetchSplashScreenImage(const std::string& id);
+  // 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);
 
   // Accessors, etc.
   void set_weak_observer(Observer* observer) { weak_observer_ = observer; }
   bool is_ready() { return is_ready_; }
@@ skipping 43 matching lines @@
   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_