Bug 1438211 P3 Implement WorkerGlobalScope::GetOrCreateServiceWorkerRegistration(). r=asuth

--HG--
extra : rebase_source : 3e6d360edafe30f95a355df25705ab4150372c8f

dom/workers/WorkerScope.cpp

@@ -559,6 +559,28 @@ WorkerGlobalScope::GetController() const
   return mWorkerPrivate->GetController();
 }
 
+RefPtr<ServiceWorkerRegistration>
+WorkerGlobalScope::GetOrCreateServiceWorkerRegistration(const ServiceWorkerRegistrationDescriptor& aDescriptor)
+{
+  mWorkerPrivate->AssertIsOnWorkerThread();
+  RefPtr<ServiceWorkerRegistration> ref;
+  ForEachEventTargetObject([&] (DOMEventTargetHelper* aTarget, bool* aDoneOut) {
+    RefPtr<ServiceWorkerRegistration> swr = do_QueryObject(aTarget);
+    if (!swr || !swr->MatchesDescriptor(aDescriptor)) {
+      return;
+    }
+
+    ref = swr.forget();
+    *aDoneOut = true;
+  });
+
+  if (!ref) {
+    ref = ServiceWorkerRegistration::CreateForWorker(mWorkerPrivate, aDescriptor);
+  }
+
+  return ref.forget();
+}
+
 DedicatedWorkerGlobalScope::DedicatedWorkerGlobalScope(WorkerPrivate* aWorkerPrivate,
                                                        const nsString& aName)
   : WorkerGlobalScope(aWorkerPrivate)

dom/workers/WorkerScope.h

@@ -34,7 +34,6 @@ enum class ImageBitmapFormat : uint8_t;
 class Performance;
 class Promise;
 class RequestOrUSVString;
-class ServiceWorkerRegistration;
 class WorkerLocation;
 class WorkerNavigator;
 class WorkerPrivate;
@@ -235,6 +234,9 @@ public:
 
   Maybe<ServiceWorkerDescriptor>
   GetController() const override;
+
+  RefPtr<mozilla::dom::ServiceWorkerRegistration>
+  GetOrCreateServiceWorkerRegistration(const ServiceWorkerRegistrationDescriptor& aDescriptor) override;
 };
 
 class DedicatedWorkerGlobalScope final : public WorkerGlobalScope