fix a problem that android cannot download files with basic authentication

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index 27db7d0ef505b755ec00fd5c6298932725e8720f..79cb7fdc1aab6d2bb85f4b673ce700bac1ec4641 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -595,6 +595,9 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   void SetAuth(const AuthCredentials& credentials);
   void CancelAuth();
 
+  // Check whether the request has authentication credentials.
+  bool HasAuth() const;
+
   // This method can be called after the user selects a client certificate to
   // instruct this URLRequest to continue with the request with the
   // certificate.  Pass NULL if the user doesn't have a client certificate.