Change Lo-Fi bool to bitmask to support multiple Previews types

content/public/common/resource_response_info.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_INFO_H_
 #define CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_INFO_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 124 matching lines @@
 
   // True when the response is served from the CacheStorage via the
   // ServiceWorker.
   bool is_in_cache_storage = false;
 
   // The cache name of the CacheStorage from where the response is served via
   // the ServiceWorker. Empty if the response isn't from the CacheStorage.
   std::string cache_storage_cache_name;
 
   // Whether or not the request was for a LoFi version of the resource.
-  bool is_using_lofi;
+  int previews_state;
 
   // Effective connection type when the resource was fetched. This is populated
   // only for responses that correspond to main frame requests.
   net::EffectiveConnectionType effective_connection_type;
 
   // DER-encoded X509Certificate certificate chain. Only present if the renderer
   // process set report_raw_headers to true.
   std::vector<std::string> certificate;
 
   // Bitmask of status info of the SSL certificate. See cert_status_flags.h for
@@ skipping 18 matching lines @@
   net::SignedCertificateTimestampAndStatusList signed_certificate_timestamps;
 
   // In case this is a CORS response fetched by a ServiceWorker, this is the
   // set of headers that should be exposed.
   std::vector<std::string> cors_exposed_header_names;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_INFO_H_