Type mismatches will silently fail and skip reading a parameter in the JSON parsing, except when parsing a size_t from a negative int. This CL updates the parsing to silently ignore negative values provided for size_t config parameters, instead of explicitly DCHECKing. Tested: Ran the fuzzer on the crash test case with + without this fix. Bug: chromium:1016139 Change-Id: I3899e81e1183aa54b708030efeb6e0006b8cd881 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/157894 Commit-Queue: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Per Åhgren <peah@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29568}