[gnome-shell] portalHelper: Fix portals which require a new window to be loaded

[Bastien Nocera <hadess src gnome org>]

commit 8369dc6b6421db577bdefb23c96f1750998ef488
Author: Catalin Iacob <iacobcatalin gmail com>
Date:   Fri Mar 24 18:57:29 2017 +0100

    portalHelper: Fix portals which require a new window to be loaded
    
    https://bugzilla.gnome.org/show_bug.cgi?id=759044

 js/portalHelper/main.js |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/js/portalHelper/main.js b/js/portalHelper/main.js
index 2928c76..b721f6a 100644
--- a/js/portalHelper/main.js
+++ b/js/portalHelper/main.js
@@ -215,6 +215,18 @@ const PortalWindow = new Lang.Class({
 
     _onDecidePolicy: function(view, decision, type) {
         if (type == WebKit.PolicyDecisionType.NEW_WINDOW_ACTION) {
+            let navigationAction = decision.get_navigation_action();
+            if (navigationAction.is_user_gesture()) {
+                // Even though the portal asks for a new window,
+                // perform the navigation in the current one. Some
+                // portals open a window as their last login step and
+                // ignoring that window causes them to not let the
+                // user go through. We don't risk popups taking over
+                // the page because we check that the navigation is
+                // user initiated.
+                this._webView.load_request(navigationAction.get_request());
+            }
+
             decision.ignore();
             return true;
         }