Bug 1905284 - Mark triggering principal as not nullable in BlobURLDataRequest. r=nika

Differential Revision: https://phabricator.services.mozilla.com/D215183

dom/file/uri/BlobURLInputStream.cpp

@@ -430,7 +430,7 @@ void BlobURLInputStream::RetrieveBlobData(const MutexAutoLock& aProofOfLock) {
 
   contentChild
       ->SendBlobURLDataRequest(
-          mBlobURLSpec, triggeringPrincipal, loadingPrincipal,
+          mBlobURLSpec, WrapNotNull(triggeringPrincipal), loadingPrincipal,
           loadInfo->GetOriginAttributes(), loadInfo->GetInnerWindowID(),
           NS_ConvertUTF16toUTF8(partKey))
       ->Then(

dom/ipc/PContent.ipdl

@@ -1801,7 +1801,7 @@ parent:
                     bool aUserActivation) returns(int32_t? requestedIndex);
 
     async BlobURLDataRequest(nsCString aBlobURL,
-                             nullable nsIPrincipal aTriggeringPrincipal,
+                             nsIPrincipal aTriggeringPrincipal,
                              nullable nsIPrincipal aLoadingPrincipal,
                              OriginAttributes aOriginAttributes,
                              uint64_t aInnerWindowId,