Additional window features are not passed as a parameter to new popup windows

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index e862ca97d371680d01b6f429a9e5fbd6cc3b5ac8..818d414f848fe42eccdb19ab5bc8bc37836de84b 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -462,6 +462,7 @@ class CONTENT_EXPORT ContentBrowserClient {
                                const content::Referrer& referrer,
                                WindowOpenDisposition disposition,
                                const blink::WebWindowFeatures& features,
+                               const std::vector<string16>& additional_features,

[jam, 2013/11/11 17:07:18]

we should keep the implementation details of no-WebString-over-IPC hidden from
this API. i.e. when you dispatch the IPC from the renderer, create a new
blink::WebWindowFeatures and set the additionalFeatures member to this array

                                bool user_gesture,
                                bool opener_suppressed,
                                content::ResourceContext* context,