Bug 1747059 - Add ShadowRealm module loader support to ScriptLoader r=yulia

Differential Revision: https://phabricator.services.mozilla.com/D147465

dom/script/ScriptLoader.cpp

@@ -172,7 +172,7 @@ NS_IMPL_CYCLE_COLLECTION(ScriptLoader, mNonAsyncExternalScriptInsertedRequests,
                          mXSLTRequests, mParserBlockingRequest,
                          mBytecodeEncodingQueue, mPreloads,
                          mPendingChildLoaders, mModuleLoader,
-                         mWebExtModuleLoaders)
+                         mWebExtModuleLoaders, mShadowRealmModuleLoaders)
 
 NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptLoader)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptLoader)
@@ -279,6 +279,13 @@ void ScriptLoader::RegisterContentScriptModuleLoader(ModuleLoader* aLoader) {
   mWebExtModuleLoaders.AppendElement(aLoader);
 }
 
+void ScriptLoader::RegisterShadowRealmModuleLoader(ModuleLoader* aLoader) {
+  MOZ_ASSERT(aLoader);
+  MOZ_ASSERT(aLoader->GetScriptLoader() == this);
+
+  mShadowRealmModuleLoaders.AppendElement(aLoader);
+}
+
 // Collect telemtry data about the cache information, and the kind of source
 // which are being loaded, and where it is being loaded from.
 static void CollectScriptTelemetry(ScriptLoadRequest* aRequest) {
@@ -2684,6 +2691,12 @@ bool ScriptLoader::HasPendingDynamicImports() const {
     }
   }
 
+  for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
+    if (loader->HasPendingDynamicImports()) {
+      return true;
+    }
+  }
+
   return false;
 }
 
@@ -3522,6 +3535,10 @@ void ScriptLoader::ParsingComplete(bool aTerminated) {
     loader->CancelAndClearDynamicImports();
   }
 
+  for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
+    loader->CancelAndClearDynamicImports();
+  }
+
   if (mParserBlockingRequest) {
     mParserBlockingRequest->Cancel();
     mParserBlockingRequest = nullptr;