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 5d02f1d3ceac904e1011da5ae0b0d1cf06953064..f936d078d0d66071e10c32a6e392ef911a7cda19 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.h
+++ b/content/browser/loader/resource_dispatcher_host_impl.h
@@ -319,6 +319,7 @@ 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
@@ -635,6 +636,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
       int child_id,
       int render_view_route_id,
       int render_frame_route_id,
+      int previews_state,
       bool download,
       ResourceContext* context);