Propagate opener to BackgroundsContents.

chrome/browser/background/background_contents_service.cc

Index: chrome/browser/background/background_contents_service.cc
diff --git a/chrome/browser/background/background_contents_service.cc b/chrome/browser/background/background_contents_service.cc
index 5e79600f3863595dab59e8ea4b7ea1d20a174011..f871735f7aa5983965c7a56e7b82b31a29082eb7 100644
--- a/chrome/browser/background/background_contents_service.cc
+++ b/chrome/browser/background/background_contents_service.cc
@@ -719,7 +719,7 @@ void BackgroundContentsService::LoadBackgroundContents(
   DVLOG(1) << "Loading background content url: " << url;
 
   BackgroundContents* contents = CreateBackgroundContents(
-      SiteInstance::CreateForURL(profile, url), MSG_ROUTING_NONE,
+      SiteInstance::CreateForURL(profile, url), nullptr, MSG_ROUTING_NONE,
       MSG_ROUTING_NONE, MSG_ROUTING_NONE, profile, frame_name, application_id,
       std::string(), NULL);
 
@@ -728,6 +728,7 @@ void BackgroundContentsService::LoadBackgroundContents(
 
 BackgroundContents* BackgroundContentsService::CreateBackgroundContents(
     scoped_refptr<SiteInstance> site,
+    content::RenderFrameHost* opener,
     int32_t routing_id,
     int32_t main_frame_route_id,
     int32_t main_frame_widget_route_id,
@@ -737,9 +738,9 @@ BackgroundContents* BackgroundContentsService::CreateBackgroundContents(
     const std::string& partition_id,
     content::SessionStorageNamespace* session_storage_namespace) {
   BackgroundContents* contents =
-      new BackgroundContents(std::move(site), routing_id, main_frame_route_id,
-                             main_frame_widget_route_id, this, partition_id,
-                             session_storage_namespace);
+      new BackgroundContents(std::move(site), opener, routing_id,
+                             main_frame_route_id, main_frame_widget_route_id,
+                             this, partition_id, session_storage_namespace);
 
   // Register the BackgroundContents internally, then send out a notification
   // to external listeners.