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

content/browser/loader/resource_dispatcher_host_impl.h

Index: content/browser/loader/resource_dispatcher_host_impl.h
diff --git a/content/browser/loader/resource_dispatcher_host_impl.h b/content/browser/loader/resource_dispatcher_host_impl.h
index 90a01121d01ef4206b863f29d7bb7c9f3df639f9..1769b75b8faa7a02a2854d84cddd810b20d71c8b 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.h
+++ b/content/browser/loader/resource_dispatcher_host_impl.h
@@ -321,6 +321,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
                             int render_process_host_id,
                             int render_view_routing_id,
                             int render_frame_routing_id,
+                            int previews_state,
                             ResourceContext* context);
 
   // Helper function for initiating a URL request. The |is_download| and
@@ -637,6 +638,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
       int child_id,
       int render_view_route_id,
       int render_frame_route_id,
+      int previews_state,
       bool download,
       ResourceContext* context);