Bug 1759163 - Add origin trial support for worklets. r=asuth

Move the trial getter to nsIGlobalObject, make every implementation
provide a reasonable value, and add a test.

Differential Revision: https://phabricator.services.mozilla.com/D140848

dom/base/nsGlobalWindowInner.cpp

@@ -1625,6 +1625,10 @@ bool nsGlobalWindowInner::ShouldResistFingerprinting() const {
   return nsIScriptGlobalObject::ShouldResistFingerprinting();
 }
 
+OriginTrials nsGlobalWindowInner::Trials() const {
+  return OriginTrials::FromWindow(this);
+}
+
 uint32_t nsGlobalWindowInner::GetPrincipalHashValue() const {
   if (mDoc) {
     return mDoc->NodePrincipal()->GetHashValue();

dom/base/nsGlobalWindowInner.h

@@ -251,6 +251,7 @@ class nsGlobalWindowInner final : public mozilla::dom::EventTarget,
   // nsIGlobalObject
   bool ShouldResistFingerprinting() const final;
   uint32_t GetPrincipalHashValue() const final;
+  mozilla::OriginTrials Trials() const final;
 
   JSObject* GetGlobalJSObject() final { return GetWrapper(); }
   JSObject* GetGlobalJSObjectPreserveColor() const final {

dom/base/nsGlobalWindowOuter.cpp

@@ -1698,6 +1698,11 @@ uint32_t nsGlobalWindowOuter::GetPrincipalHashValue() const {
   return 0;
 }
 
+OriginTrials nsGlobalWindowOuter::Trials() const {
+  return mInnerWindow ? nsGlobalWindowInner::Cast(mInnerWindow)->Trials()
+                      : OriginTrials();
+}
+
 nsresult nsGlobalWindowOuter::EnsureScriptEnvironment() {
   if (GetWrapperPreserveColor()) {
     return NS_OK;

dom/base/nsGlobalWindowOuter.h

@@ -231,6 +231,7 @@ class nsGlobalWindowOuter final : public mozilla::dom::EventTarget,
   // nsIGlobalObject
   bool ShouldResistFingerprinting() const final;
   uint32_t GetPrincipalHashValue() const final;
+  mozilla::OriginTrials Trials() const final;
 
   // nsIGlobalJSObjectHolder
   JSObject* GetGlobalJSObject() final { return GetWrapper(); }

dom/base/nsIGlobalObject.h

@@ -12,6 +12,7 @@
 #include "mozilla/dom/ClientInfo.h"
 #include "mozilla/dom/DispatcherTrait.h"
 #include "mozilla/dom/ServiceWorkerDescriptor.h"
+#include "mozilla/OriginTrials.h"
 #include "nsHashKeys.h"
 #include "nsISupports.h"
 #include "nsStringFwd.h"
@@ -196,6 +197,9 @@ class nsIGlobalObject : public nsISupports,
    */
   virtual mozilla::StorageAccess GetStorageAccess();
 
+  // Returns the set of active origin trials for this global.
+  virtual mozilla::OriginTrials Trials() const = 0;
+
   // Returns a pointer to this object as an inner window if this is one or
   // nullptr otherwise.
   nsPIDOMWindowInner* AsInnerWindow();

dom/bindings/SimpleGlobalObject.h

@@ -20,8 +20,7 @@
 #include "nsISupportsImpl.h"
 #include "nsCycleCollectionParticipant.h"
 
-namespace mozilla {
-namespace dom {
+namespace mozilla::dom {
 
 class SimpleGlobalObject : public nsIGlobalObject, public nsWrapperCache {
  public:
@@ -67,8 +66,10 @@ class SimpleGlobalObject : public nsIGlobalObject, public nsWrapperCache {
     return GetWrapperPreserveColor();
   }
 
-  virtual JSObject* WrapObject(JSContext* cx,
-                               JS::Handle<JSObject*> aGivenProto) override {
+  OriginTrials Trials() const override { return {}; }
+
+  JSObject* WrapObject(JSContext* cx,
+                       JS::Handle<JSObject*> aGivenProto) override {
     MOZ_CRASH("SimpleGlobalObject doesn't use DOM bindings!");
   }
 
@@ -82,7 +83,6 @@ class SimpleGlobalObject : public nsIGlobalObject, public nsWrapperCache {
   const GlobalType mType;
 };
 
-}  // namespace dom
-}  // namespace mozilla
+}  // namespace mozilla::dom
 
 #endif /* mozilla_dom_SimpleGlobalObject_h__ */

dom/media/webaudio/AudioWorkletGlobalScope.cpp

@@ -35,15 +35,17 @@ NS_IMPL_ADDREF_INHERITED(AudioWorkletGlobalScope, WorkletGlobalScope)
 NS_IMPL_RELEASE_INHERITED(AudioWorkletGlobalScope, WorkletGlobalScope)
 
 AudioWorkletGlobalScope::AudioWorkletGlobalScope(AudioWorkletImpl* aImpl)
-    : WorkletGlobalScope(aImpl->GetAgentClusterId(),
-                         aImpl->IsSharedMemoryAllowed()),
-      mImpl(aImpl) {}
+    : WorkletGlobalScope(aImpl) {}
+
+AudioWorkletImpl* AudioWorkletGlobalScope::Impl() const {
+  return static_cast<AudioWorkletImpl*>(mImpl.get());
+}
 
 bool AudioWorkletGlobalScope::WrapGlobalObject(
     JSContext* aCx, JS::MutableHandle<JSObject*> aReflector) {
   // |this| is being exposed to JS and content script will soon be running.
   // The graph needs a handle on the JSContext so it can interrupt JS.
-  mImpl->DestinationTrack()->Graph()->NotifyJSContext(aCx);
+  Impl()->DestinationTrack()->Graph()->NotifyJSContext(aCx);
 
   JS::RealmOptions options;
 
@@ -189,7 +191,8 @@ void AudioWorkletGlobalScope::RegisterProcessor(
    */
   NS_DispatchToMainThread(NS_NewRunnableFunction(
       "AudioWorkletGlobalScope: parameter descriptors",
-      [impl = mImpl, name = nsString(aName), map = std::move(map)]() mutable {
+      [impl = RefPtr{Impl()}, name = nsString(aName),
+       map = std::move(map)]() mutable {
         AudioNode* destinationNode =
             impl->DestinationTrack()->Engine()->NodeMainThread();
         if (!destinationNode) {
@@ -199,10 +202,8 @@ void AudioWorkletGlobalScope::RegisterProcessor(
       }));
 }
 
-WorkletImpl* AudioWorkletGlobalScope::Impl() const { return mImpl; }
-
 uint64_t AudioWorkletGlobalScope::CurrentFrame() const {
-  AudioNodeTrack* destinationTrack = mImpl->DestinationTrack();
+  AudioNodeTrack* destinationTrack = Impl()->DestinationTrack();
   GraphTime processedTime = destinationTrack->Graph()->ProcessedTime();
   return destinationTrack->GraphTimeToTrackTime(processedTime);
 }
@@ -212,7 +213,7 @@ double AudioWorkletGlobalScope::CurrentTime() const {
 }
 
 float AudioWorkletGlobalScope::SampleRate() const {
-  return static_cast<float>(mImpl->DestinationTrack()->mSampleRate);
+  return static_cast<float>(Impl()->DestinationTrack()->mSampleRate);
 }
 
 AudioParamDescriptorMap AudioWorkletGlobalScope::DescriptorsFromJS(

dom/media/webaudio/AudioWorkletGlobalScope.h

@@ -39,7 +39,7 @@ class AudioWorkletGlobalScope final : public WorkletGlobalScope {
                          AudioWorkletProcessorConstructor& aProcessorCtor,
                          ErrorResult& aRv);
 
-  WorkletImpl* Impl() const override;
+  AudioWorkletImpl* Impl() const;
 
   uint64_t CurrentFrame() const;
 
@@ -69,8 +69,6 @@ class AudioWorkletGlobalScope final : public WorkletGlobalScope {
                                             JS::ForOfIterator* aIter,
                                             ErrorResult& aRv);
 
-  const RefPtr<AudioWorkletImpl> mImpl;
-
   typedef nsRefPtrHashtable<nsStringHashKey, AudioWorkletProcessorConstructor>
       NodeNameToProcessorDefinitionMap;
   NodeNameToProcessorDefinitionMap mNameToProcessorMap;

dom/origin-trials/OriginTrials.cpp

@@ -159,18 +159,9 @@ bool OriginTrials::IsEnabled(JSContext* aCx, JSObject* aObject,
     return true;
   }
   LOG("OriginTrials::IsEnabled(%d)\n", int(aTrial));
-
-  if (dom::WorkletThread::IsOnWorkletThread()) {
-    // TODO: Worklet support, clean up the assumption below than not main thread
-    // means worker.
-    return false;
-  }
-
-  const OriginTrials trials =
-      NS_IsMainThread()
-          ? FromWindow(xpc::WindowGlobalOrNull(js::UncheckedUnwrap(aObject)))
-          : dom::GetWorkerPrivateFromContext(aCx)->Trials();
-  return trials.IsEnabled(aTrial);
+  nsIGlobalObject* global = xpc::CurrentNativeGlobal(aCx);
+  MOZ_ASSERT(global);
+  return global && global->Trials().IsEnabled(aTrial);
 }
 
 #undef LOG

dom/origin-trials/tests/common.js

@@ -1,23 +1,48 @@
 /* import-globals-from ../../../testing/mochitest/tests/SimpleTest/SimpleTest.js */
 
+// This would be a bit nicer with `self`, but Worklet doesn't have that, so
+// `globalThis` it is, see https://github.com/whatwg/html/issues/7696
 function workerReply(port) {
-  port.postMessage({ testTrialInterfaceExposed: !!self.TestTrialInterface });
+  port.postMessage({
+    testTrialInterfaceExposed: !!globalThis.TestTrialInterface,
+  });
 }
 
 if (
-  self.SharedWorkerGlobalScope &&
-  self instanceof self.SharedWorkerGlobalScope
+  globalThis.SharedWorkerGlobalScope &&
+  globalThis instanceof globalThis.SharedWorkerGlobalScope
 ) {
-  self.addEventListener("connect", function(e) {
+  globalThis.addEventListener("connect", function(e) {
     const port = e.ports[0];
     workerReply(port);
   });
-} else if (self.WorkerGlobalScope && self instanceof self.WorkerGlobalScope) {
-  self.addEventListener("message", workerReply(self));
+} else if (
+  globalThis.WorkerGlobalScope &&
+  globalThis instanceof globalThis.WorkerGlobalScope
+) {
+  workerReply(globalThis);
+} else if (
+  globalThis.WorkletGlobalScope &&
+  globalThis instanceof globalThis.WorkletGlobalScope
+) {
+  class Processor extends AudioWorkletProcessor {
+    constructor() {
+      super();
+      this.port.start();
+      workerReply(this.port);
+    }
+
+    process(inputs, outputs, parameters) {
+      // Do nothing, output silence
+      return true;
+    }
+  }
+  registerProcessor("test-processor", Processor);
 }
 
 function assertTestTrialActive(shouldBeActive) {
   add_task(async function() {
+    info("Main thread test: " + document.URL);
     is(
       !!navigator.testTrialGatedAttribute,
       shouldBeActive,
@@ -35,48 +60,54 @@ function assertTestTrialActive(shouldBeActive) {
       );
     }
 
-    {
-      const worker = new Worker("common.js");
-      await new Promise(resolve => {
-        worker.addEventListener(
+    function promiseWorkerWorkletMessage(target, context) {
+      info(`promiseWorkerWorkletMessage(${context})`);
+      return new Promise(resolve => {
+        target.addEventListener(
           "message",
           function(e) {
             is(
               e.data.testTrialInterfaceExposed,
               shouldBeActive,
-              "Should work as expected in workers"
+              "Should work as expected in " + context
             );
+            info(`got ${context} message`);
             resolve();
           },
           { once: true }
         );
-        worker.postMessage("ping");
       });
+    }
+
+    {
+      info("Worker test");
+      const worker = new Worker("common.js");
+      await promiseWorkerWorkletMessage(worker, "worker");
       worker.terminate();
     }
 
     {
+      info("SharedWorker test");
       // We want a unique worker per page since the trial state depends on the
       // creator document.
       const worker = new SharedWorker("common.js", document.URL);
-      const promise = new Promise(resolve => {
-        worker.port.addEventListener(
-          "message",
-          function(e) {
-            is(
-              e.data.testTrialInterfaceExposed,
-              shouldBeActive,
-              "Should work as expected in shared workers"
-            );
-            resolve();
-          },
-          { once: true }
-        );
-      });
+      const promise = promiseWorkerWorkletMessage(worker.port, "shared worker");
       worker.port.start();
       await promise;
     }
 
+    {
+      info("AudioWorklet test");
+      const audioContext = new AudioContext();
+      await audioContext.audioWorklet.addModule("common.js");
+      audioContext.resume();
+      const workletNode = new AudioWorkletNode(audioContext, "test-processor");
+      const promise = promiseWorkerWorkletMessage(workletNode.port, "worklet");
+      workletNode.port.start();
+      await promise;
+      await audioContext.close();
+    }
+
     // FIXME(emilio): Add more tests.
     //  * Stuff hanging off Window or Document (bug 1757935).
   });

dom/origin-trials/tests/mochitest.ini

@@ -7,8 +7,11 @@ support-files =
     common.js
 # Test interfaces only exposed on DEBUG builds.
 skip-if = !debug
+# AudioWorklet requires secure context
+scheme = https
 
 [test_meta_simple.html]
 [test_header_simple.html]
 [test_trial_hidden.html]
 [test_expired_token.html]
+[test_wrong_origin.html]

dom/origin-trials/tests/test_expired_token.html

@@ -1,6 +1,6 @@
 <!doctype html>
-<!-- Created with: mktoken --origin 'http://mochi.test:8888' --feature TestTrial --expiry 'Wed, 01 Jan 2000 01:00:00 +0100' --sign test-keys/test-ecdsa.pkcs8 -->
-<meta http-equiv="origin-trial" content="A4GPgfKWSUlgUucdY2ESQAuu8pNiChJxAf+cf5KEe5O3OZNrHW4DuGdjzZShUhEwWZ3m30BaoBYnVSPCXNrQRSMAAABMeyJvcmlnaW4iOiJodHRwOi8vbW9jaGkudGVzdDo4ODg4IiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6OTQ2Njg0ODAwfQ==">
+<!-- Created with: mktoken --origin 'https://example.com' --feature TestTrial --expiry '01 Jan 2000 01:00:00 +0100' --sign test-keys/test-ecdsa.pkcs8 -->
+<meta http-equiv="origin-trial" content="A41+wSMhPQeR9B+AofdiFzheyZVF+gP4ubTNzrt6v8Qcjv68j1eINNFCxVe5/vdy4cO9dGDkwd9eizsib70RgAQAAABJeyJvcmlnaW4iOiJodHRwczovL2V4YW1wbGUuY29tIiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6OTQ2Njg0ODAwfQ==">
 <script src="/tests/SimpleTest/SimpleTest.js"></script>
 <script src="common.js"></script>
 <script>

dom/origin-trials/tests/test_header_simple.html^headers^

@@ -1 +1 @@
-Origin-Trial: Ax+NsjHu0gB7huPad279C/p0ENAZR3R5lXAtKx0YTLbNsFFoYFFgDqxjCP10AHezcyyPrNS+uHHO72QdJM3eqMYAAABOeyJvcmlnaW4iOiJodHRwOi8vbW9jaGkudGVzdDo4ODg4IiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6MzI1MDM2ODAwMDB9
+Origin-Trial: AyGdETIKWLLqe+chG57f74gZcjYSfbdYAapEq7DA49E6CmaYaPmaoXh/4tAe5XJJJdwwpFVal7hz/irC+Wvp1HgAAABLeyJvcmlnaW4iOiJodHRwczovL2V4YW1wbGUuY29tIiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6MzI1MDM2ODAwMDB9

dom/origin-trials/tests/test_meta_simple.html

@@ -1,6 +1,6 @@
 <!doctype html>
-<!-- Created with: mktoken --origin 'http://mochi.test:8888' --feature TestTrial --expiry 'Wed, 01 Jan 3000 01:00:00 +0100' --sign test-keys/test-ecdsa.pkcs8 -->
-<meta http-equiv="origin-trial" content="Ax+NsjHu0gB7huPad279C/p0ENAZR3R5lXAtKx0YTLbNsFFoYFFgDqxjCP10AHezcyyPrNS+uHHO72QdJM3eqMYAAABOeyJvcmlnaW4iOiJodHRwOi8vbW9jaGkudGVzdDo4ODg4IiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6MzI1MDM2ODAwMDB9">
+<!-- Created with: mktoken --origin 'https://example.com' --feature TestTrial --expiry 'Wed, 01 Jan 3000 01:00:00 +0100' --sign test-keys/test-ecdsa.pkcs8 -->
+<meta http-equiv="origin-trial" content="AyGdETIKWLLqe+chG57f74gZcjYSfbdYAapEq7DA49E6CmaYaPmaoXh/4tAe5XJJJdwwpFVal7hz/irC+Wvp1HgAAABLeyJvcmlnaW4iOiJodHRwczovL2V4YW1wbGUuY29tIiwiZmVhdHVyZSI6IlRlc3RUcmlhbCIsImV4cGlyeSI6MzI1MDM2ODAwMDB9">
 <script src="/tests/SimpleTest/SimpleTest.js"></script>
 <script src="common.js"></script>
 <script>

dom/origin-trials/tests/test_wrong_origin.html

@@ -0,0 +1,8 @@
+<!doctype html>
+<!-- Created with: mktoken --origin 'https://not-example.com' --feature TestTrial --expiry '01 Jan 3000 01:00:00 +0100' --sign test-keys/test-ecdsa.pkcs8 -->
+<meta http-equiv="origin-trial" content="A1nUsa3CwtYj28syX2jYUogdrg+ZsjjNfAvmdg3SGybXxaJFbNq7i8AmY6Fo3OUe6Xvza3R0YYfaGTqM0TOU2OAAAABPeyJvcmlnaW4iOiJodHRwczovL25vdC1leGFtcGxlLmNvbSIsImZlYXR1cmUiOiJUZXN0VHJpYWwiLCJleHBpcnkiOjMyNTAzNjgwMDAwfQ==">
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<script src="common.js"></script>
+<script>
+  assertTestTrialActive(false);
+</script>

dom/workers/WorkerScope.cpp

@@ -275,6 +275,11 @@ uint32_t WorkerGlobalScopeBase::GetPrincipalHashValue() const {
   return mWorkerPrivate->GetPrincipalHashValue();
 }
 
+OriginTrials WorkerGlobalScopeBase::Trials() const {
+  mWorkerPrivate->AssertIsOnWorkerThread();
+  return mWorkerPrivate->Trials();
+}
+
 StorageAccess WorkerGlobalScopeBase::GetStorageAccess() {
   mWorkerPrivate->AssertIsOnWorkerThread();
   return mWorkerPrivate->StorageAccess();

dom/workers/WorkerScope.h

@@ -116,6 +116,8 @@ class WorkerGlobalScopeBase : public DOMEventTargetHelper,
 
   uint32_t GetPrincipalHashValue() const final;
 
+  OriginTrials Trials() const final;
+
   StorageAccess GetStorageAccess() final;
 
   Maybe<ClientInfo> GetClientInfo() const final;

dom/worklet/WorkletGlobalScope.cpp

@@ -38,11 +38,8 @@ NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WorkletGlobalScope)
   NS_INTERFACE_MAP_ENTRY(WorkletGlobalScope)
 NS_INTERFACE_MAP_END
 
-WorkletGlobalScope::WorkletGlobalScope(const Maybe<nsID>& aAgentClusterId,
-                                       bool aSharedMemoryAllowed)
-    : mCreationTimeStamp(TimeStamp::Now()),
-      mAgentClusterId(aAgentClusterId),
-      mSharedMemoryAllowed(aSharedMemoryAllowed) {}
+WorkletGlobalScope::WorkletGlobalScope(WorkletImpl* aImpl)
+    : mImpl(aImpl), mCreationTimeStamp(TimeStamp::Now()) {}
 
 WorkletGlobalScope::~WorkletGlobalScope() = default;
 
@@ -68,6 +65,16 @@ already_AddRefed<Console> WorkletGlobalScope::GetConsole(JSContext* aCx,
   return console.forget();
 }
 
+OriginTrials WorkletGlobalScope::Trials() const { return mImpl->Trials(); }
+
+Maybe<nsID> WorkletGlobalScope::GetAgentClusterId() const {
+  return mImpl->GetAgentClusterId();
+}
+
+bool WorkletGlobalScope::IsSharedMemoryAllowed() const {
+  return mImpl->IsSharedMemoryAllowed();
+}
+
 void WorkletGlobalScope::Dump(const Optional<nsAString>& aString) const {
   WorkletThread::AssertIsOnWorkletThread();
 

dom/worklet/WorkletGlobalScope.h

@@ -38,8 +38,7 @@ class WorkletGlobalScope : public nsIGlobalObject, public nsWrapperCache {
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(WorkletGlobalScope)
 
-  WorkletGlobalScope(const Maybe<nsID>& aAgentClusterId,
-                     bool aSharedMemoryAllowed);
+  WorkletGlobalScope(WorkletImpl*);
 
   nsIGlobalObject* GetParentObject() const { return nullptr; }
 
@@ -56,7 +55,7 @@ class WorkletGlobalScope : public nsIGlobalObject, public nsWrapperCache {
 
   already_AddRefed<Console> GetConsole(JSContext* aCx, ErrorResult& aRv);
 
-  virtual WorkletImpl* Impl() const = 0;
+  WorkletImpl* Impl() const { return mImpl.get(); }
 
   void Dump(const Optional<nsAString>& aString) const;
 
@@ -66,19 +65,17 @@ class WorkletGlobalScope : public nsIGlobalObject, public nsWrapperCache {
     return duration.ToMilliseconds();
   }
 
-  Maybe<nsID> GetAgentClusterId() const override { return mAgentClusterId; }
-
-  bool IsSharedMemoryAllowed() const override { return mSharedMemoryAllowed; }
+  OriginTrials Trials() const override;
+  Maybe<nsID> GetAgentClusterId() const override;
+  bool IsSharedMemoryAllowed() const override;
 
  protected:
   ~WorkletGlobalScope();
-  ;
 
+  const RefPtr<WorkletImpl> mImpl;
  private:
   TimeStamp mCreationTimeStamp;
-  Maybe<nsID> mAgentClusterId;
   RefPtr<Console> mConsole;
-  bool mSharedMemoryAllowed;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(WorkletGlobalScope, WORKLET_IID)

dom/worklet/WorkletImpl.cpp

@@ -41,7 +41,8 @@ WorkletImpl::WorkletImpl(nsPIDOMWindowInner* aWindow, nsIPrincipal* aPrincipal)
     : mPrincipal(NullPrincipal::CreateWithInheritedAttributes(aPrincipal)),
       mWorkletLoadInfo(aWindow),
       mTerminated(false),
-      mFinishedOnExecutionThread(false) {
+      mFinishedOnExecutionThread(false),
+      mTrials(OriginTrials::FromWindow(nsGlobalWindowInner::Cast(aWindow))) {
   Unused << NS_WARN_IF(
       NS_FAILED(ipc::PrincipalToPrincipalInfo(mPrincipal, &mPrincipalInfo)));
 

dom/worklet/WorkletImpl.h

@@ -10,6 +10,7 @@
 #include "MainThreadUtils.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/OriginAttributes.h"
+#include "mozilla/OriginTrials.h"
 #include "mozilla/ipc/PBackgroundSharedTypes.h"
 
 class nsPIDOMWindowInner;
@@ -71,6 +72,7 @@ class WorkletImpl {
 
   // Any thread.
 
+  const OriginTrials& Trials() const { return mTrials; }
   const WorkletLoadInfo& LoadInfo() const { return mWorkletLoadInfo; }
   const OriginAttributes& OriginAttributesRef() const {
     return mPrincipalInfo.get_NullPrincipalInfo().attrs();
@@ -115,6 +117,8 @@ class WorkletImpl {
   Maybe<nsID> mAgentClusterId;
 
   bool mSharedMemoryAllowed;
+
+  const OriginTrials mTrials;
 };
 
 }  // namespace mozilla

js/xpconnect/src/BackstagePass.h

@@ -18,11 +18,11 @@
 
 class XPCWrappedNative;
 
-class BackstagePass : public nsIGlobalObject,
-                      public nsIScriptObjectPrincipal,
-                      public nsIXPCScriptable,
-                      public nsIClassInfo,
-                      public nsSupportsWeakReference {
+class BackstagePass final : public nsIGlobalObject,
+                            public nsIScriptObjectPrincipal,
+                            public nsIXPCScriptable,
+                            public nsIClassInfo,
+                            public nsSupportsWeakReference {
  public:
   BackstagePass();
 
@@ -30,13 +30,13 @@ class BackstagePass : public nsIGlobalObject,
   NS_DECL_NSIXPCSCRIPTABLE
   NS_DECL_NSICLASSINFO
 
-  virtual nsIPrincipal* GetPrincipal() override { return mPrincipal; }
+  nsIPrincipal* GetPrincipal() override { return mPrincipal; }
 
-  virtual nsIPrincipal* GetEffectiveStoragePrincipal() override {
-    return mPrincipal;
-  }
+  nsIPrincipal* GetEffectiveStoragePrincipal() override { return mPrincipal; }
 
-  virtual nsIPrincipal* PartitionedPrincipal() override { return mPrincipal; }
+  nsIPrincipal* PartitionedPrincipal() override { return mPrincipal; }
+
+  mozilla::OriginTrials Trials() const override { return {}; }
 
   JSObject* GetGlobalJSObject() override;
   JSObject* GetGlobalJSObjectPreserveColor() const override;

js/xpconnect/src/SandboxPrivate.h

@@ -49,6 +49,8 @@ class SandboxPrivate : public nsIGlobalObject,
     return static_cast<SandboxPrivate*>(sop);
   }
 
+  mozilla::OriginTrials Trials() const final { return {}; }
+
   nsIPrincipal* GetPrincipal() override { return mPrincipal; }
 
   nsIPrincipal* GetEffectiveStoragePrincipal() override { return mPrincipal; }

layout/style/PaintWorkletGlobalScope.cpp

@@ -11,13 +11,14 @@
 #include "mozilla/dom/FunctionBinding.h"
 #include "PaintWorkletImpl.h"
 
-namespace mozilla {
-namespace dom {
+namespace mozilla::dom {
 
 PaintWorkletGlobalScope::PaintWorkletGlobalScope(PaintWorkletImpl* aImpl)
-    : WorkletGlobalScope(aImpl->GetAgentClusterId(),
-                         aImpl->IsSharedMemoryAllowed()),
-      mImpl(aImpl) {}
+    : WorkletGlobalScope(aImpl) {}
+
+PaintWorkletImpl* PaintWorkletGlobalScope::Impl() const {
+  return static_cast<PaintWorkletImpl*>(mImpl.get());
+}
 
 bool PaintWorkletGlobalScope::WrapGlobalObject(
     JSContext* aCx, JS::MutableHandle<JSObject*> aReflector) {
@@ -40,7 +41,4 @@ void PaintWorkletGlobalScope::RegisterPaint(const nsAString& aType,
   // Nothing to do here, yet.
 }
 
-WorkletImpl* PaintWorkletGlobalScope::Impl() const { return mImpl; }
-
-}  // namespace dom
-}  // namespace mozilla
+}  // namespace mozilla::dom

layout/style/PaintWorkletGlobalScope.h

@@ -26,12 +26,10 @@ class PaintWorkletGlobalScope final : public WorkletGlobalScope {
 
   void RegisterPaint(const nsAString& aType, VoidFunction& aProcessorCtor);
 
-  WorkletImpl* Impl() const override;
+  PaintWorkletImpl* Impl() const;
 
  private:
   ~PaintWorkletGlobalScope() = default;
-
-  const RefPtr<PaintWorkletImpl> mImpl;
 };
 
 }  // namespace dom