Some servo build fixes.

components/script/dom/cssrulelist.rs

@@ -17,7 +17,9 @@ use crate::stylesheet_loader::StylesheetLoader;
 use dom_struct::dom_struct;
 use servo_arc::Arc;
 use style::shared_lock::Locked;
-use style::stylesheets::{CssRules, CssRulesHelpers, KeyframesRule, RulesMutateError};
+use style::stylesheets::{
+    AllowImportRules, CssRules, CssRulesHelpers, KeyframesRule, RulesMutateError,
+};
 
 #[allow(unsafe_code)]
 unsafe_no_jsmanaged_fields!(RulesSource);
@@ -116,6 +118,7 @@ impl CSSRuleList {
                 index,
                 nested,
                 Some(&loader),
+                AllowImportRules::Yes,
             )
         })?;
 

components/script/dom/element.rs

@@ -682,10 +682,7 @@ impl<'dom> LayoutElementHelpers<'dom> for LayoutDom<'dom, Element> {
             hints.push(from_declaration(
                 shared_lock,
                 PropertyDeclaration::BackgroundImage(background_image::SpecifiedValue(
-                    vec![specified::ImageLayer::Image(specified::Image::for_cascade(
-                        url.into(),
-                    ))]
-                    .into(),
+                    vec![specified::Image::for_cascade(url.into())].into(),
                 )),
             ));
         }
@@ -3164,10 +3161,6 @@ impl<'a> SelectorsElement for DomRoot<Element> {
         false
     }
 
-    fn exported_part(&self, _: &Atom) -> Option<Atom> {
-        None
-    }
-
     fn imported_part(&self, _: &Atom) -> Option<Atom> {
         None
     }

components/script/dom/htmlstyleelement.rs

@@ -26,7 +26,7 @@ use servo_arc::Arc;
 use std::cell::Cell;
 use style::media_queries::MediaList;
 use style::parser::ParserContext as CssParserContext;
-use style::stylesheets::{CssRuleType, Origin, Stylesheet};
+use style::stylesheets::{AllowImportRules, CssRuleType, Origin, Stylesheet};
 use style_traits::ParsingMode;
 
 #[dom_struct]
@@ -119,6 +119,7 @@ impl HTMLStyleElement {
             css_error_reporter,
             doc.quirks_mode(),
             self.line_number as u32,
+            AllowImportRules::Yes,
         );
 
         let sheet = Arc::new(sheet);