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diff --git a/dom/script/ShadowRealmGlobalScope.h b/dom/script/ShadowRealmGlobalScope.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_ShadowRealmGlobalScope_h
+#define mozilla_dom_ShadowRealmGlobalScope_h
+
+#include "js/TypeDecls.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/OriginTrials.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "nsContentUtils.h"
+#include "nsIGlobalObject.h"
+#include "nsWrapperCache.h"
+
+#include "js/loader/ModuleLoaderBase.h"
+
+namespace mozilla::dom {
+
+#define SHADOWREALMGLOBALSCOPE_IID \
+ { /* 1b0a59dd-c1cb-429a-bb90-cea17994dba2 */ \
+ 0x1b0a59dd, 0xc1cb, 0x429a, { \
+ 0xbb, 0x90, 0xce, 0xa1, 0x79, 0x94, 0xdb, 0xa2 \
+ } \
+ }
+
+// Required for providing the wrapper, as this is the global used inside a Gecko
+// backed ShadowRealm, but also required to power module resolution.
+class ShadowRealmGlobalScope final : public nsIGlobalObject,
+ public nsWrapperCache {
+ public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(ShadowRealmGlobalScope)
+
+ NS_DECLARE_STATIC_IID_ACCESSOR(SHADOWREALMGLOBALSCOPE_IID)
+
+ explicit ShadowRealmGlobalScope(nsIGlobalObject* aCreatingGlobal)
+ : mCreatingGlobal(aCreatingGlobal){};
+
+ nsIGlobalObject* GetCreatingGlobal() const { return mCreatingGlobal; }
+ OriginTrials Trials() const override { return {}; }
+
+ JSObject* GetGlobalJSObject() override { return GetWrapper(); }
+ JSObject* GetGlobalJSObjectPreserveColor() const override {
+ return GetWrapperPreserveColor();
+ }
+
+ virtual JSObject* WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) override {
+ MOZ_CRASH("Shouldn't be here");
+ return nullptr;
+ }
+
+ JS::loader::ModuleLoaderBase* GetModuleLoader(JSContext* aCx) override;
+
+ bool ShouldResistFingerprinting(RFPTarget aTarget) const override {
+ return nsContentUtils::ShouldResistFingerprinting(
+ "Presently we don't have enough context to make an informed decision"
+ "on JS Sandboxes. See 1782853",
+ aTarget);
+ }
+
+ nsISerialEventTarget* SerialEventTarget() const final {
+ return mozilla::GetMainThreadSerialEventTarget();
+ }
+ nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const final {
+ return mozilla::SchedulerGroup::Dispatch(std::move(aRunnable));
+ }
+
+ private:
+ virtual ~ShadowRealmGlobalScope() = default;
+
+ RefPtr<JS::loader::ModuleLoaderBase> mModuleLoader;
+
+ // The global which created this ShadowRealm
+ nsCOMPtr<nsIGlobalObject> mCreatingGlobal;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(ShadowRealmGlobalScope,
+ SHADOWREALMGLOBALSCOPE_IID)
+
+JSObject* NewShadowRealmGlobal(JSContext* aCx, JS::RealmOptions& aOptions,
+ JSPrincipals* aPrincipals,
+ JS::Handle<JSObject*> aGlobalObj);
+
+bool IsShadowRealmGlobal(JSObject* aObject);
+
+} // namespace mozilla::dom
+
+#endif