Auto merge of #24332 - saschanaz:mixin, r=jdm

Migrate to IDL mixin syntax

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- [ ] `./mach build -d` does not report any errors
- [ ] `./mach test-tidy` does not report any errors
- [x] These changes fix #22539

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1 files changed, 2 insertions, 2 deletions

diff --git a/components/script/dom/webidls/ElementCSSInlineStyle.webidl b/components/script/dom/webidls/ElementCSSInlineStyle.webidl
index c2af8985948..c71106f3201 100644
--- a/components/script/dom/webidls/ElementCSSInlineStyle.webidl
+++ b/components/script/dom/webidls/ElementCSSInlineStyle.webidl
@@ -4,7 +4,7 @@
 
 //http://dev.w3.org/csswg/cssom/#elementcssinlinestyle
 
-[NoInterfaceObject, Exposed=Window]
-interface ElementCSSInlineStyle {
+[Exposed=Window]
+interface mixin ElementCSSInlineStyle {
   [SameObject/*, PutForwards=cssText*/] readonly attribute CSSStyleDeclaration style;
 };