--- a/servo/components/style/gecko_bindings/structs_debug.rs
+++ b/servo/components/style/gecko_bindings/structs_debug.rs
@@ -11007,39 +11007,38 @@ pub enum nsStyleContentType {
     eStyleContentType_AltContent = 50,
     eStyleContentType_Uninitialized = 51,
 }
 #[repr(C)]
 #[derive(Debug)]
 pub struct nsStyleContentData {
     pub mType: nsStyleContentType,
     pub mContent: nsStyleContentData__bindgen_ty_1,
-    pub mImageTracked: bool,
 }
 #[repr(C)]
 #[derive(Debug, Copy)]
 pub struct nsStyleContentData__bindgen_ty_1 {
     pub mString: __BindgenUnionField<*mut u16>,
-    pub mImage: __BindgenUnionField<*mut imgRequestProxy>,
+    pub mImage: __BindgenUnionField<*mut nsStyleImageRequest>,
     pub mCounters: __BindgenUnionField<*mut nsCSSValue_Array>,
     pub bindgen_union_field: u64,
 }
 #[test]
 fn bindgen_test_layout_nsStyleContentData__bindgen_ty_1() {
     assert_eq!(::std::mem::size_of::<nsStyleContentData__bindgen_ty_1>() ,
                8usize);
     assert_eq!(::std::mem::align_of::<nsStyleContentData__bindgen_ty_1>() ,
                8usize);
 }
 impl Clone for nsStyleContentData__bindgen_ty_1 {
     fn clone(&self) -> Self { *self }
 }
 #[test]
 fn bindgen_test_layout_nsStyleContentData() {
-    assert_eq!(::std::mem::size_of::<nsStyleContentData>() , 24usize);
+    assert_eq!(::std::mem::size_of::<nsStyleContentData>() , 16usize);
     assert_eq!(::std::mem::align_of::<nsStyleContentData>() , 8usize);
 }
 #[repr(C)]
 #[derive(Debug)]
 pub struct nsStyleCounterData {
     pub mCounter: nsString,
     pub mValue: i32,
 }

--- a/servo/components/style/gecko_bindings/structs_release.rs
+++ b/servo/components/style/gecko_bindings/structs_release.rs
@@ -10969,17 +10969,17 @@ pub enum nsStyleContentType {
 pub struct nsStyleContentData {
     pub mType: nsStyleContentType,
     pub mContent: nsStyleContentData__bindgen_ty_1,
 }
 #[repr(C)]
 #[derive(Debug, Copy)]
 pub struct nsStyleContentData__bindgen_ty_1 {
     pub mString: __BindgenUnionField<*mut u16>,
-    pub mImage: __BindgenUnionField<*mut imgRequestProxy>,
+    pub mImage: __BindgenUnionField<*mut nsStyleImageRequest>,
     pub mCounters: __BindgenUnionField<*mut nsCSSValue_Array>,
     pub bindgen_union_field: u64,
 }
 #[test]
 fn bindgen_test_layout_nsStyleContentData__bindgen_ty_1() {
     assert_eq!(::std::mem::size_of::<nsStyleContentData__bindgen_ty_1>() ,
                8usize);
     assert_eq!(::std::mem::align_of::<nsStyleContentData__bindgen_ty_1>() ,