Plumb the correct owner document through DocumentInit::m_owner.

extensions/browser/app_window/test_app_window_contents.h

Index: extensions/browser/app_window/test_app_window_contents.h
diff --git a/extensions/browser/app_window/test_app_window_contents.h b/extensions/browser/app_window/test_app_window_contents.h
index f93b682b543720d7fbbab72c30bc65503af3fb1d..c118fe65e9efc9e1991d866cf67f6f8525ded9e4 100644
--- a/extensions/browser/app_window/test_app_window_contents.h
+++ b/extensions/browser/app_window/test_app_window_contents.h
@@ -24,7 +24,9 @@ class TestAppWindowContents : public AppWindowContents {
   ~TestAppWindowContents() override;
 
   // apps:AppWindowContents:
-  void Initialize(content::BrowserContext* context, const GURL& url) override;
+  void Initialize(content::BrowserContext* context,
+                  content::RenderFrameHost* creator_frame,
+                  const GURL& url) override;
   void LoadContents(int32_t creator_process_id) override;
   void NativeWindowChanged(NativeAppWindow* native_app_window) override;
   void NativeWindowClosed() override;