Remove some configuration from the extension URLRequestContexts.

chrome/browser/profiles/off_the_record_profile_io_data.h

Index: chrome/browser/profiles/off_the_record_profile_io_data.h
diff --git a/chrome/browser/profiles/off_the_record_profile_io_data.h b/chrome/browser/profiles/off_the_record_profile_io_data.h
index 7861412fd59b6c7b8ba0f78dd9956c10dd545690..eb287e0731f7c3b827519beae6dbbc99f5199e87 100644
--- a/chrome/browser/profiles/off_the_record_profile_io_data.h
+++ b/chrome/browser/profiles/off_the_record_profile_io_data.h
@@ -141,8 +141,6 @@ class OffTheRecordProfileIOData : public ProfileIOData {
 
   mutable std::unique_ptr<net::CookieStore> extensions_cookie_store_;
 
-  mutable std::unique_ptr<net::URLRequestJobFactory> extensions_job_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(OffTheRecordProfileIOData);
 };