Bug 1862896 - Expose CustomStateSet in DevTools sandbox. r=smaug,devtools-reviewers,ochameau.

This will be used in next patch to customize rendering of CustomStateSet in DevTools.

Differential Revision: https://phabricator.services.mozilla.com/D204596

devtools/shared/loader/base-loader.sys.mjs

@@ -119,6 +119,7 @@ function Sandbox(options) {
       "ChromeUtils",
       "CSS",
       "CSSRule",
+      "CustomStateSet",
       "DOMParser",
       "Element",
       "Event",

js/xpconnect/src/Sandbox.cpp

@@ -50,6 +50,7 @@
 #include "mozilla/dom/DOMParserBinding.h"
 #include "mozilla/dom/DOMTokenListBinding.h"
 #include "mozilla/dom/ElementBinding.h"
+#include "mozilla/dom/ElementInternalsBinding.h"
 #include "mozilla/dom/EventBinding.h"
 #include "mozilla/dom/Exceptions.h"
 #include "mozilla/dom/IndexedDatabaseManager.h"
@@ -901,6 +902,8 @@ bool xpc::GlobalProperties::Parse(JSContext* cx, JS::HandleObject obj) {
       CSS = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "CSSRule")) {
       CSSRule = true;
+    } else if (JS_LinearStringEqualsLiteral(nameStr, "CustomStateSet")) {
+      CustomStateSet = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "Document")) {
       Document = true;
     } else if (JS_LinearStringEqualsLiteral(nameStr, "Directory")) {
@@ -1027,6 +1030,11 @@ bool xpc::GlobalProperties::Define(JSContext* cx, JS::HandleObject obj) {
     return false;
   }
 
+  if (CustomStateSet &&
+      !dom::CustomStateSet_Binding::GetConstructorObject(cx)) {
+    return false;
+  }
+
   if (Directory && !dom::Directory_Binding::GetConstructorObject(cx))
     return false;
 

js/xpconnect/src/xpcprivate.h

@@ -2191,6 +2191,7 @@ struct GlobalProperties {
   bool ChromeUtils : 1;
   bool CSS : 1;
   bool CSSRule : 1;
+  bool CustomStateSet : 1;
   bool Directory : 1;
   bool Document : 1;
   bool DOMException : 1;