Calling DebugBreak() on Windows during fatal checks instead of relying on abort().

Bug: webrtc:10846
Change-Id: Ie701f47b9b7c9d88ea983540dce3f429903a18f7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/147879
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28771}

rtc_base/checks.cc

@@ -157,6 +157,9 @@ RTC_NORETURN void FatalLog(const char* file,
   fflush(stdout);
   fprintf(stderr, "%s", output);
   fflush(stderr);
+#if defined(WEBRTC_WIN)
+  DebugBreak();
+#endif
   abort();
 }