Allow script to request durable storage permission (chrome side)

chrome/browser/storage/durable_storage_permission_context_factory.cc

+// Copyright 2015 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/storage/durable_storage_permission_context_factory.h"
+
+#include "chrome/browser/profiles/incognito_helpers.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/storage/durable_storage_permission_context.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+// static
+DurableStoragePermissionContext*
+DurableStoragePermissionContextFactory::GetForProfile(Profile* profile) {
+  return static_cast<DurableStoragePermissionContext*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+// static
+DurableStoragePermissionContextFactory*
+DurableStoragePermissionContextFactory::GetInstance() {
+  return Singleton<DurableStoragePermissionContextFactory>::get();
+}
+
+DurableStoragePermissionContextFactory::DurableStoragePermissionContextFactory()
+    : BrowserContextKeyedServiceFactory(
+          "DurableStoragePermissionContext",
+          BrowserContextDependencyManager::GetInstance()) {
+}
+
+KeyedService* DurableStoragePermissionContextFactory::BuildServiceInstanceFor(
+    content::BrowserContext* profile) const {
+  return new DurableStoragePermissionContext(static_cast<Profile*>(profile));
+}
+
+content::BrowserContext*
+DurableStoragePermissionContextFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextOwnInstanceInIncognito(context);
+}