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

content/public/common/resource_response_info.cc

Index: content/public/common/resource_response_info.cc
diff --git a/content/public/common/resource_response_info.cc b/content/public/common/resource_response_info.cc
index 3cf6ca109a04aaf2df15764bdd8cd57e8b652531..51d0644fb22e7133fd5110cc8651e630db7d93f7 100644
--- a/content/public/common/resource_response_info.cc
+++ b/content/public/common/resource_response_info.cc
@@ -5,6 +5,7 @@
 #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 {
@@ -24,7 +25,7 @@ ResourceResponseInfo::ResourceResponseInfo()
       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),