A refactor in r240784 missed this line, which was unreachable code before and should have removed. Instead, it has been run every time after sending an append to the AppendPipeline, and it just happens it doesn't have visible consequences. This patch cleans that up removing that line. No visible behavior changes are introduces.
Created attachment 403786 [details] Patch
I agree with this patch. The changes on r240784 made AppendPipeline::pushNewBuffer() unable to return any error for early append failure. Therefore the call to sourceBufferPrivateAppendComplete() (which should happend only in case of error) wouldn't be needed anymore.
Committed r264161: <https://trac.webkit.org/changeset/264161> All reviewed patches have been landed. Closing bug and clearing flags on attachment 403786 [details].