Add rtc::FatalMessage -- webrtc.org's implementation for RTC_CHECK/RTC_DCHECK/etc (#3994)
Add rtc::FatalMessage -- webrtc.org's implementation for RTC_CHECK/RTC_DCHECK/etc (#3994)


lonnen/socorro,Tayamarn/socorro,Tayamarn/socorro,lonnen/socorro,mozilla/socorro,lonnen/socorro,lonnen/socorro,Tayamarn/socorro,Tayamarn/socorro,Tayamarn/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,mozilla/socorro,Tayamarn/socorro,mozilla/socorro