1 files changed, 3 insertions, 4 deletions
diff --git a/dom/file/uri/BlobURLProtocolHandler.cpp b/dom/file/uri/BlobURLProtocolHandler.cpp
index 3e2d8e788e..978e88cc8b 100644
--- a/dom/file/uri/BlobURLProtocolHandler.cpp
+++ b/dom/file/uri/BlobURLProtocolHandler.cpp
@@ -948,7 +948,7 @@ nsresult NS_GetBlobForBlobURISpec(const nsACString& aSpec,
 }
 
 // Blob requests may specify a range header. We parse, validate, and
-// store that info here, and save it on the nsBaseChannel, where it
+// store that info here, and save it on the nsIBaseChannel, where it
 // can be accessed by BlobURLInputStream::StoreBlobImplStream.
 nsresult NS_SetChannelContentRangeForBlobURI(nsIChannel* aChannel, nsIURI* aURI,
                                              nsACString& aRangeHeader) {
@@ -963,9 +963,8 @@ nsresult NS_SetChannelContentRangeForBlobURI(nsIChannel* aChannel, nsIURI* aURI,
   if (result.Failed()) {
     return NS_ERROR_NO_CONTENT;
   }
-  nsBaseChannel* bchan = static_cast<nsBaseChannel*>(aChannel);
-  MOZ_ASSERT(bchan);
-  if (!bchan->SetContentRange(aRangeHeader, size)) {
+  nsCOMPtr<nsIBaseChannel> baseChan = do_QueryInterface(aChannel);
+  if (!baseChan || !baseChan->SetContentRangeFromHeader(aRangeHeader, size)) {
     return NS_ERROR_NET_PARTIAL_TRANSFER;
   }
   return NS_OK;