7764b5c55 Only call destruction_callback if non-null (flutter/engine#24845) (#77734)
7764b5c55 Only call destruction_callback if non-null (flutter/engine#24845) (#77734)


tvolkert/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter