Remove some uses of assert() breaking MSVC compiling, use RTC_DCHECK instead. Bug: webrtc:11201 Change-Id: Ie6c3607e422ea17d3393352b4915da3fa24779f9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161949 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Reviewed-by: Patrik Höglund <phoglund@google.com> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30081}