Bug 1459562 - Transmit the permissions of the owning principal together with the blobURL when broadcasted to content processes, r=nika

dom/ipc/ContentParent.cpp

@@ -2467,6 +2467,11 @@ ContentParent::InitInternal(ProcessPriority aInitialPriority)
     nsTArray<BlobURLRegistrationData> registrations;
     if (nsHostObjectProtocolHandler::GetAllBlobURLEntries(registrations,
                                                           this)) {
+      for (const BlobURLRegistrationData& registration : registrations) {
+        rv = TransmitPermissionsForPrincipal(registration.principal());
+        Unused << NS_WARN_IF(NS_FAILED(rv));
+      }
+
       Unused << SendInitBlobURLs(registrations);
     }
   }
@@ -5147,8 +5152,13 @@ ContentParent::BroadcastBlobURLRegistration(const nsACString& aURI,
 
   for (auto* cp : AllProcesses(eLive)) {
     if (cp != aIgnoreThisCP) {
+      nsresult rv = cp->TransmitPermissionsForPrincipal(principal);
+      if (NS_WARN_IF(NS_FAILED(rv))) {
+        break;
+      }
+
       IPCBlob ipcBlob;
-      nsresult rv = IPCBlobUtils::Serialize(aBlobImpl, cp, ipcBlob);
+      rv = IPCBlobUtils::Serialize(aBlobImpl, cp, ipcBlob);
       if (NS_WARN_IF(NS_FAILED(rv))) {
         break;
       }