Enable file_system_provider::Service in incognito.

chrome/browser/chromeos/file_system_provider/service_factory.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/file_system_provider/service_factory.h"
 
 #include "chrome/browser/chromeos/file_system_provider/service.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_registry_factory.h"
 
 namespace chromeos {
 namespace file_system_provider {
 
 // static
 Service* ServiceFactory::Get(content::BrowserContext* context) {
   return static_cast<Service*>(
@@ skipping 22 matching lines @@
 
 KeyedService* ServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new Service(
       Profile::FromBrowserContext(profile),
       extensions::ExtensionRegistry::Get(Profile::FromBrowserContext(profile)));
 }
 
 bool ServiceFactory::ServiceIsCreatedWithBrowserContext() const { return true; }
 
+content::BrowserContext* ServiceFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextRedirectedInIncognito(context);
+}
+
 }  // namespace file_system_provider
 }  // namespace chromeos