Make it so that allow_js_access: false can be used with background pages created by window.open.

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 9a3c5a50004301b22e8fa1fb0db6c3c9ef673c5f..b390748732b1edf3c8dc681f4d15703cd2774ccf 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -336,14 +336,16 @@ class ContentBrowserClient {
       int notification_id) = 0;
 
   // Returns true if the given page is allowed to open a window of the given
-  // type.
+  // type. If true is returned, |no_javascript_access| will indicate whether
+  // the window that is created should be scriptable/in the same process.
   // This is called on the IO thread.
   virtual bool CanCreateWindow(
       const GURL& opener_url,
       const GURL& source_origin,
       WindowContainerType container_type,
       content::ResourceContext* context,
-      int render_process_id) = 0;
+      int render_process_id,
+      bool* no_javascript_access) = 0;
 
   // Returns a title string to use in the task manager for a process host with
   // the given URL, or the empty string to fall back to the default logic.