Plumb the correct owner document through DocumentInit::m_owner.

extensions/browser/app_window/app_window_contents.h

Index: extensions/browser/app_window/app_window_contents.h
diff --git a/extensions/browser/app_window/app_window_contents.h b/extensions/browser/app_window/app_window_contents.h
index 37a4027133c349c3ad78733813f37eedff9c91d9..732197c391cad0d597b00f1d9d001a72a7767436 100644
--- a/extensions/browser/app_window/app_window_contents.h
+++ b/extensions/browser/app_window/app_window_contents.h
@@ -32,7 +32,9 @@ class AppWindowContentsImpl : public AppWindowContents,
   ~AppWindowContentsImpl() override;
 
   // 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;