Store URLs in WebappDataStorage, and purge them when history is cleared.

chrome/browser/android/banners/app_banner_data_fetcher_android.cc

 // 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.
 
 #include "chrome/browser/android/banners/app_banner_data_fetcher_android.h"
 
 #include <utility>
 
 #include "chrome/browser/android/banners/app_banner_infobar_delegate_android.h"
 #include "chrome/browser/android/shortcut_helper.h"
@@ skipping 53 matching lines @@
 
   GURL image_url = ManifestIconSelector::FindBestMatchingIcon(
       web_app_data().icons, ideal_splash_image_size_in_dp_,
       minimum_splash_image_size_in_dp_);
 
   ShortcutHelper::FetchSplashScreenImage(
       web_contents,
       image_url,
       ideal_splash_image_size_in_dp_,
       minimum_splash_image_size_in_dp_,
-      webapp_id);
+      webapp_id,
+      web_app_data().start_url.spec());
 }
 
 void AppBannerDataFetcherAndroid::ShowBanner(const SkBitmap* icon,
                                              const base::string16& title,
                                              const std::string& referrer) {
   content::WebContents* web_contents = GetWebContents();
   DCHECK(web_contents);
 
   infobars::InfoBar* infobar = nullptr;
   if (native_app_data_.is_null()) {
@@ skipping 18 matching lines @@
     if (infobar) {
       RecordDidShowBanner("AppBanner.NativeApp.Shown");
       TrackDisplayEvent(DISPLAY_EVENT_NATIVE_APP_BANNER_CREATED);
     }
   }
   InfoBarService::FromWebContents(web_contents)
       ->AddInfoBar(make_scoped_ptr(infobar));
 }
 
 }  // namespace banners