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

chrome/browser/android/banners/app_banner_infobar_delegate_android.cc

Index: chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
diff --git a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
index 43204e58d41be665ba819c9ea5499e824917eea5..8e54002f2cdd6df1e8bb55d75de6b314b1ceb852 100644
--- a/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
+++ b/chrome/browser/android/banners/app_banner_infobar_delegate_android.cc
@@ -253,13 +253,10 @@ bool AppBannerInfoBarDelegateAndroid::Accept() {
 
     const std::string& uid = base::GenerateGUID();
     content::BrowserThread::PostTask(
-        content::BrowserThread::IO,
-        FROM_HERE,
-        base::Bind(&ShortcutHelper::AddShortcutInBackgroundWithSkBitmap,
-                   info,
-                   uid,
-                   *app_icon_.get()));
-    data_fetcher_->FetchWebappSplashScreenImage(uid);
+        content::BrowserThread::IO, FROM_HERE,
+        base::Bind(&ShortcutHelper::AddShortcutInBackgroundWithSkBitmap, info,
+                   uid, *app_icon_.get(),
+                   data_fetcher_->FetchWebappSplashScreenImageCallback(uid)));
 
     SendBannerAccepted(web_contents, "web");
     return true;