This CL fixes an issue where the aecdump file handle gets garbage
collected and closed early in the call.
Bug: webrtc:8822
Change-Id: I959908da164b0ec61ccd976fc52f3d919da11b52
Reviewed-on: https://webrtc-review.googlesource.com/46103
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21839}