Allow only responsive websites to install as a web app on mobile.

chrome/browser/banners/app_banner_data_fetcher.cc

Index: chrome/browser/banners/app_banner_data_fetcher.cc
diff --git a/chrome/browser/banners/app_banner_data_fetcher.cc b/chrome/browser/banners/app_banner_data_fetcher.cc
index 8507486b7dd56f534c17137f751a747bcba7bf5d..949c3b1ee282be9a5ea4dd7cf272432beb65a58a 100644
--- a/chrome/browser/banners/app_banner_data_fetcher.cc
+++ b/chrome/browser/banners/app_banner_data_fetcher.cc
@@ -241,11 +241,15 @@ void AppBannerDataFetcher::OnDidGetManifest(
     return;
   }
 
-  banners::TrackDisplayEvent(DISPLAY_EVENT_BANNER_REQUESTED);
-
   web_app_data_ = manifest;
   app_title_ = web_app_data_.name.string();
 
+  HandleWebApp(web_contents);
+}
+
+void AppBannerDataFetcher::HandleWebApp(content::WebContents* web_contents) {
+  banners::TrackDisplayEvent(DISPLAY_EVENT_BANNER_REQUESTED);
+
   // Check to see if there is a single service worker controlling this page
   // and the manifest's start url.
   Profile* profile =
@@ -256,7 +260,7 @@ void AppBannerDataFetcher::OnDidGetManifest(
   DCHECK(storage_partition);
 
   storage_partition->GetServiceWorkerContext()->CheckHasServiceWorker(
-      validated_url_, manifest.start_url,
+      validated_url_, web_app_data_.start_url,
       base::Bind(&AppBannerDataFetcher::OnDidCheckHasServiceWorker,
                  this));
 }