Create a new URLRequestJobFactory for isolated request contexts.

chrome/browser/profiles/off_the_record_profile_io_data.cc

Index: chrome/browser/profiles/off_the_record_profile_io_data.cc
diff --git a/chrome/browser/profiles/off_the_record_profile_io_data.cc b/chrome/browser/profiles/off_the_record_profile_io_data.cc
index 0bdf74d89832b1318b0042906c55d826ad55c3de..11635ab972cbb53cea0474f08c2bc0d352280bf8 100644
--- a/chrome/browser/profiles/off_the_record_profile_io_data.cc
+++ b/chrome/browser/profiles/off_the_record_profile_io_data.cc
@@ -297,10 +297,10 @@ OffTheRecordProfileIOData::InitializeAppRequestContext(
       net::HttpCache::DefaultBackend::InMemory(0);
   net::HttpNetworkSession* main_network_session =
       main_http_factory_->GetSession();
-  net::HttpCache* app_http_cache =
-      new net::HttpCache(main_network_session, app_backend);
+  scoped_ptr<net::HttpTransactionFactory> app_http_cache(
+      new net::HttpCache(main_network_session, app_backend));
 
-  context->SetHttpTransactionFactory(app_http_cache);
+  context->SetHttpTransactionFactory(app_http_cache.Pass());
   return context;
 }