Fix IsPrecachingAllowed() to check Sync instead of Data Saver.

components/precache/content/precache_manager_factory.h

-// Copyright 2013 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.
-
-#ifndef COMPONENTS_PRECACHE_CONTENT_PRECACHE_MANAGER_FACTORY_H_
-#define COMPONENTS_PRECACHE_CONTENT_PRECACHE_MANAGER_FACTORY_H_
-
-#include "base/basictypes.h"
-#include "base/memory/singleton.h"
-#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
-
-namespace content {
-class BrowserContext;
-}
-
-namespace precache {
-
-class PrecacheManager;
-
-class PrecacheManagerFactory : public BrowserContextKeyedServiceFactory {
- public:
-  static PrecacheManager* GetForBrowserContext(
-      content::BrowserContext* browser_context);
-  static PrecacheManagerFactory* GetInstance();
-
- private:
-  friend struct DefaultSingletonTraits<PrecacheManagerFactory>;
-
-  PrecacheManagerFactory();
-  ~PrecacheManagerFactory() override;
-
-  // BrowserContextKeyedServiceFactory:
-  KeyedService* BuildServiceInstanceFor(
-      content::BrowserContext* browser_context) const override;
-
-  DISALLOW_COPY_AND_ASSIGN(PrecacheManagerFactory);
-};
-
-}  // namespace precache
-
-#endif  // COMPONENTS_PRECACHE_CONTENT_PRECACHE_MANAGER_FACTORY_H_