1 files changed, 4 insertions, 0 deletions
diff --git a/components/script/layout_interface.rs b/components/script/layout_interface.rs
index 230ebe79692..9647ddd4376 100644
--- a/components/script/layout_interface.rs
+++ b/components/script/layout_interface.rs
@@ -28,6 +28,7 @@ use string_cache::Atom;
 use style::animation::PropertyAnimation;
 use style::media_queries::MediaQueryList;
 use style::stylesheets::Stylesheet;
+use style::viewport::ViewportRule;
 use url::Url;
 pub use dom::node::TrustedNodeAddress;
 
@@ -39,6 +40,9 @@ pub enum Msg {
     /// Adds the given stylesheet to the document.
     LoadStylesheet(Url, MediaQueryList, PendingAsyncLoad, Box<StylesheetLoadResponder + Send>),
 
+    /// Adds a @viewport rule (translated from a <META name="viewport"> element) to the document.
+    AddMetaViewport(ViewportRule),
+
     /// Puts a document into quirks mode, causing the quirks mode stylesheet to be loaded.
     SetQuirksMode,