Plumb the correct owner document through DocumentInit::m_owner.

extensions/browser/app_window/app_window.cc

Index: extensions/browser/app_window/app_window.cc
diff --git a/extensions/browser/app_window/app_window.cc b/extensions/browser/app_window/app_window.cc
index 5bb73e65f741281d507f804a1b889fcf9bfc79ea..e6039766543d116b4b167fe825bada561d3ab996 100644
--- a/extensions/browser/app_window/app_window.cc
+++ b/extensions/browser/app_window/app_window.cc
@@ -259,10 +259,11 @@ AppWindow::AppWindow(BrowserContext* context,
 
 void AppWindow::Init(const GURL& url,
                      AppWindowContents* app_window_contents,
+                     content::RenderFrameHost* creator_frame,
                      const CreateParams& params) {
   // Initialize the render interface and web contents
   app_window_contents_.reset(app_window_contents);
-  app_window_contents_->Initialize(browser_context(), url);
+  app_window_contents_->Initialize(browser_context(), creator_frame, url);
 
   initial_url_ = url;