Remove PermissionContext factories

chrome/browser/background_sync/background_sync_permission_context_factory.cc

-// Copyright 2016 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/background_sync/background_sync_permission_context_factory.h"
-
-#include "chrome/browser/background_sync/background_sync_permission_context.h"
-#include "chrome/browser/profiles/profile.h"
-#include "components/keyed_service/content/browser_context_dependency_manager.h"
-
-// static
-BackgroundSyncPermissionContext*
-BackgroundSyncPermissionContextFactory::GetForProfile(Profile* profile) {
-  return static_cast<BackgroundSyncPermissionContext*>(
-      GetInstance()->GetServiceForBrowserContext(profile, true /* create */));
-}
-
-// static
-BackgroundSyncPermissionContextFactory*
-BackgroundSyncPermissionContextFactory::GetInstance() {
-  return base::Singleton<BackgroundSyncPermissionContextFactory>::get();
-}
-
-BackgroundSyncPermissionContextFactory::BackgroundSyncPermissionContextFactory()
-    : PermissionContextFactoryBase(
-          "BackgroundSyncPermissionContext",
-          BrowserContextDependencyManager::GetInstance()) {}
-
-KeyedService* BackgroundSyncPermissionContextFactory::BuildServiceInstanceFor(
-    content::BrowserContext* profile) const {
-  return new BackgroundSyncPermissionContext(static_cast<Profile*>(profile));
-}