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

content/public/common/resource_response_info.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 "content/public/common/resource_response_info.h"
 
 #include "content/public/common/appcache_info.h"
+#include "content/public/common/previews_state.h"
 #include "net/http/http_response_headers.h"
 
 namespace content {
 
 ResourceResponseInfo::ResourceResponseInfo()
     : has_major_certificate_errors(false),
       content_length(-1),
       encoded_data_length(-1),
       encoded_body_length(-1),
       appcache_id(kAppCacheNoCacheId),
       was_fetched_via_spdy(false),
       was_alpn_negotiated(false),
       was_alternate_protocol_available(false),
       connection_info(net::HttpResponseInfo::CONNECTION_INFO_UNKNOWN),
       was_fetched_via_service_worker(false),
       was_fetched_via_foreign_fetch(false),
       was_fallback_required_by_service_worker(false),
       response_type_via_service_worker(
           blink::WebServiceWorkerResponseTypeDefault),
-      is_using_lofi(false),
+      previews_state(PREVIEWS_OFF),
       effective_connection_type(net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN),
       cert_status(0),
       ssl_connection_status(0),
       ssl_key_exchange_group(0) {}
 
 ResourceResponseInfo::ResourceResponseInfo(const ResourceResponseInfo& other) =
     default;
 
 ResourceResponseInfo::~ResourceResponseInfo() {
 }
 
 }  // namespace content