Bug 1642149 - P2 ImportScript() in workers must respect the coressponding COEP header r=dom-workers-and-storage-reviewers,perry

When loading a sub-script in workers, the corresponding COEP must be set on the channel's nsILoadInfo, such that its CORP header can be checked as expected.

Differential Revision: https://phabricator.services.mozilla.com/D77720

dom/workers/ScriptLoader.cpp

@@ -1119,6 +1119,22 @@ class ScriptLoaderRunnable final : public nsIRunnable, public nsINamed {
       }
     }
 
+    if (StaticPrefs::browser_tabs_remote_useCrossOriginEmbedderPolicy()) {
+      nsILoadInfo::CrossOriginEmbedderPolicy respectedCOEP =
+          mWorkerPrivate->GetEmbedderPolicy();
+      if (mWorkerPrivate->IsDedicatedWorker() &&
+          respectedCOEP == nsILoadInfo::EMBEDDER_POLICY_NULL) {
+        respectedCOEP = mWorkerPrivate->GetOwnerEmbedderPolicy();
+      }
+
+      nsCOMPtr<nsILoadInfo> channelLoadInfo;
+      rv = channel->GetLoadInfo(getter_AddRefs(channelLoadInfo));
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        return rv;
+      }
+      channelLoadInfo->SetLoadingEmbedderPolicy(respectedCOEP);
+    }
+
     if (loadInfo.mCacheStatus != ScriptLoadInfo::ToBeCached) {
       rv = channel->AsyncOpen(loader);
       if (NS_WARN_IF(NS_FAILED(rv))) {

testing/web-platform/meta/html/cross-origin-embedder-policy/require-corp-sw.https.html.ini

@@ -1,4 +0,0 @@
-[require-corp-sw.https.html]
-  [importScripts() fails for a script with no corp.]
-    expected: FAIL
-