This fixes a crash caused by access to already freed memory returned by VideoDecoderWrapper::ImplementationName method. Bug: webrtc:7760 Change-Id: Ia4b020d1dd861e6a45637abde35f12951b7c43ea Reviewed-on: https://webrtc-review.googlesource.com/9420 Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20290}