diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index 89010477bee..c68b1294437 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -428,11 +428,14 @@ extern "C" {
 extern "C" {
     pub fn Gecko_LoadStyleSheet(loader: *mut Loader,
                                 parent: *mut ServoStyleSheet,
-                                import_rule: RawServoImportRuleBorrowed,
+                                child_sheet: RawServoStyleSheetBorrowed,
                                 base_url_data: *mut RawGeckoURLExtraData,
                                 url_bytes: *const u8, url_length: u32,
                                 media_bytes: *const u8, media_length: u32);
 }
+extern "C" {
+    pub fn Gecko_URLExtraData_CreateDummy() -> *mut RawGeckoURLExtraData;
+}
 extern "C" {
     pub fn Gecko_MaybeCreateStyleChildrenIterator(node: RawGeckoNodeBorrowed)
      -> StyleChildrenIteratorOwnedOrNull;
@@ -1377,7 +1380,6 @@ extern "C" {
                                               *mut ServoStyleSheet,
                                           data: *const nsACString,
                                           parsing_mode: SheetParsingMode,
-                                          base_url: *const nsACString,
                                           extra_data:
                                               *mut RawGeckoURLExtraData)
      -> RawServoStyleSheetStrong;
@@ -1466,8 +1468,9 @@ extern "C" {
     pub fn Servo_CssRules_InsertRule(rules: ServoCssRulesBorrowed,
                                      sheet: RawServoStyleSheetBorrowed,
                                      rule: *const nsACString, index: u32,
-                                     nested: bool, rule_type: *mut u16)
-     -> nsresult;
+                                     nested: bool, loader: *mut Loader,
+                                     gecko_stylesheet: *mut ServoStyleSheet,
+                                     rule_type: *mut u16) -> nsresult;
 }
 extern "C" {
     pub fn Servo_CssRules_DeleteRule(rules: ServoCssRulesBorrowed, index: u32)
@@ -1549,13 +1552,11 @@ extern "C" {
 extern "C" {
     pub fn Servo_ParseProperty(property: *const nsACString,
                                value: *const nsACString,
-                               base: *const nsACString,
                                data: *mut RawGeckoURLExtraData)
      -> RawServoDeclarationBlockStrong;
 }
 extern "C" {
     pub fn Servo_ParseEasing(easing: *const nsAString,
-                             base: *const nsACString,
                              data: *mut RawGeckoURLExtraData,
                              output: nsTimingFunctionBorrowedMut) -> bool;
 }
@@ -1610,7 +1611,6 @@ extern "C" {
 }
 extern "C" {
     pub fn Servo_ParseStyleAttribute(data: *const nsACString,
-                                     base: *const nsACString,
                                      extra_data: *mut RawGeckoURLExtraData)
      -> RawServoDeclarationBlockStrong;
 }
@@ -1678,7 +1678,6 @@ extern "C" {
                                               property: *const nsACString,
                                               value: *const nsACString,
                                               is_important: bool,
-                                              base: *const nsACString,
                                               data: *mut RawGeckoURLExtraData)
      -> bool;
 }
@@ -1688,7 +1687,6 @@ extern "C" {
                                                   property: nsCSSPropertyID,
                                                   value: *const nsACString,
                                                   is_important: bool,
-                                                  base: *const nsACString,
                                                   data:
                                                       *mut RawGeckoURLExtraData)
      -> bool;
diff --git a/components/style/gecko_bindings/structs_debug.rs b/components/style/gecko_bindings/structs_debug.rs
index 3cb0c48012b..58f435393e5 100644
--- a/components/style/gecko_bindings/structs_debug.rs
+++ b/components/style/gecko_bindings/structs_debug.rs
@@ -5626,7 +5626,8 @@ pub mod root {
         #[derive(Debug)]
         pub struct StyleSheet {
             pub _base: root::nsIDOMCSSStyleSheet,
-            pub _base_1: root::nsWrapperCache,
+            pub _base_1: root::nsICSSLoaderObserver,
+            pub _base_2: root::nsWrapperCache,
             pub mRefCnt: root::nsCycleCollectingAutoRefCnt,
             pub _mOwningThread: root::nsAutoOwningThread,
             pub mParent: *mut root::mozilla::StyleSheet,
@@ -5709,7 +5710,7 @@ pub mod root {
         }
         #[test]
         fn bindgen_test_layout_StyleSheet() {
-            assert_eq!(::std::mem::size_of::<StyleSheet>() , 128usize , concat
+            assert_eq!(::std::mem::size_of::<StyleSheet>() , 136usize , concat
                        ! ( "Size of: " , stringify ! ( StyleSheet ) ));
             assert_eq! (::std::mem::align_of::<StyleSheet>() , 8usize , concat
                         ! ( "Alignment of " , stringify ! ( StyleSheet ) ));
@@ -14743,6 +14744,30 @@ pub mod root {
         fn clone(&self) -> Self { *self }
     }
     #[repr(C)]
+    #[derive(Debug, Copy)]
+    pub struct nsICSSLoaderObserver {
+        pub _base: root::nsISupports,
+    }
+    #[repr(C)]
+    #[derive(Debug, Copy, Clone)]
+    pub struct nsICSSLoaderObserver_COMTypeInfo<T, U> {
+        pub _address: u8,
+        pub _phantom_0: ::std::marker::PhantomData<T>,
+        pub _phantom_1: ::std::marker::PhantomData<U>,
+    }
+    #[test]
+    fn bindgen_test_layout_nsICSSLoaderObserver() {
+        assert_eq!(::std::mem::size_of::<nsICSSLoaderObserver>() , 8usize ,
+                   concat ! (
+                   "Size of: " , stringify ! ( nsICSSLoaderObserver ) ));
+        assert_eq! (::std::mem::align_of::<nsICSSLoaderObserver>() , 8usize ,
+                    concat ! (
+                    "Alignment of " , stringify ! ( nsICSSLoaderObserver ) ));
+    }
+    impl Clone for nsICSSLoaderObserver {
+        fn clone(&self) -> Self { *self }
+    }
+    #[repr(C)]
     #[derive(Debug)]
     pub struct nsAttrValue {
         pub mBits: usize,
diff --git a/components/style/gecko_bindings/structs_release.rs b/components/style/gecko_bindings/structs_release.rs
index 8442777cbcc..06bbbc53ae3 100644
--- a/components/style/gecko_bindings/structs_release.rs
+++ b/components/style/gecko_bindings/structs_release.rs
@@ -5535,7 +5535,8 @@ pub mod root {
         #[derive(Debug)]
         pub struct StyleSheet {
             pub _base: root::nsIDOMCSSStyleSheet,
-            pub _base_1: root::nsWrapperCache,
+            pub _base_1: root::nsICSSLoaderObserver,
+            pub _base_2: root::nsWrapperCache,
             pub mRefCnt: root::nsCycleCollectingAutoRefCnt,
             pub mParent: *mut root::mozilla::StyleSheet,
             pub mTitle: ::nsstring::nsStringRepr,
@@ -5617,7 +5618,7 @@ pub mod root {
         }
         #[test]
         fn bindgen_test_layout_StyleSheet() {
-            assert_eq!(::std::mem::size_of::<StyleSheet>() , 120usize , concat
+            assert_eq!(::std::mem::size_of::<StyleSheet>() , 128usize , concat
                        ! ( "Size of: " , stringify ! ( StyleSheet ) ));
             assert_eq! (::std::mem::align_of::<StyleSheet>() , 8usize , concat
                         ! ( "Alignment of " , stringify ! ( StyleSheet ) ));
@@ -14233,6 +14234,30 @@ pub mod root {
         fn clone(&self) -> Self { *self }
     }
     #[repr(C)]
+    #[derive(Debug, Copy)]
+    pub struct nsICSSLoaderObserver {
+        pub _base: root::nsISupports,
+    }
+    #[repr(C)]
+    #[derive(Debug, Copy, Clone)]
+    pub struct nsICSSLoaderObserver_COMTypeInfo<T, U> {
+        pub _address: u8,
+        pub _phantom_0: ::std::marker::PhantomData<T>,
+        pub _phantom_1: ::std::marker::PhantomData<U>,
+    }
+    #[test]
+    fn bindgen_test_layout_nsICSSLoaderObserver() {
+        assert_eq!(::std::mem::size_of::<nsICSSLoaderObserver>() , 8usize ,
+                   concat ! (
+                   "Size of: " , stringify ! ( nsICSSLoaderObserver ) ));
+        assert_eq! (::std::mem::align_of::<nsICSSLoaderObserver>() , 8usize ,
+                    concat ! (
+                    "Alignment of " , stringify ! ( nsICSSLoaderObserver ) ));
+    }
+    impl Clone for nsICSSLoaderObserver {
+        fn clone(&self) -> Self { *self }
+    }
+    #[repr(C)]
     #[derive(Debug)]
     pub struct nsAttrValue {
         pub mBits: usize,