webapps: initial addition of splash screen icon downloading

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/basictypes.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "base/timer/timer.h"
@@ skipping 35 matching lines @@
 
     // Called when all the data needed to create a shortcut is available.
     virtual void OnDataAvailable(const ShortcutInfo& info,
                                  const SkBitmap& icon) = 0;
   };
 
   // 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_splash_image_size_in_dp,
+                             int ideal_icon_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);
+
   // 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_; }
   ShortcutInfo& shortcut_info() { return shortcut_info_; }
@@ skipping 21 matching lines @@
   // Notifies the observer that the shortcut data is all available.
   void NotifyObserver(const SkBitmap& icon);
 
   Observer* weak_observer_;
 
   bool is_waiting_for_web_application_info_;
   bool is_icon_saved_;
   bool is_ready_;
   base::Timer icon_timeout_timer_;
   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 preferred_icon_size_in_px_;
-  static const int kPreferredIconSizeInDp;
+  const int ideal_splash_image_size_in_dp_;
+  const int ideal_icon_size_in_dp_;
 
   friend class base::RefCounted<AddToHomescreenDataFetcher>;
   DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDataFetcher);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DATA_FETCHER_H_