Popular sites on the NTP: store downloaded file at a fixed path

chrome/browser/android/popular_sites.h

Index: chrome/browser/android/popular_sites.h
diff --git a/chrome/browser/android/popular_sites.h b/chrome/browser/android/popular_sites.h
index a8170627b04ea74acd735afc1997a245d895b177..be5687978315c85dc2bfe8ae5bdf3a7b30a0b52a 100644
--- a/chrome/browser/android/popular_sites.h
+++ b/chrome/browser/android/popular_sites.h
@@ -45,9 +45,10 @@ class PopularSites {
 
   using FinishedCallback = base::Callback<void(bool /* success */)>;
 
+  // Usually, the name of the file that's downloaded is based on the user's
+  // locale. |filename|, if non-empty, will override that default name.
   PopularSites(Profile* profile,
                const std::string& filename,
-               net::URLRequestContextGetter* request_context,
                const FinishedCallback& callback);
   ~PopularSites();