Since webrtc::RTCNonStandardStatsMember<T> extends some explicit template initializations, its symbols need to be exported as well. Example of an lld-link error: https://ci.chromium.org/p/chromium/builders/try/win_chromium_compile_dbg_ng/435974 Bug: webrtc:9419 Change-Id: I48bd484b821b17a214e0180e78ba34c38e247947 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/159693 Reviewed-by: Steve Anton <steveanton@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29780}