24843 Roll Skia from 8f440b4e1e22 to 00d6cf436884 (1 revision) (cla: yes, waiting for tree to go green)

24844 Roll Dart SDK from fee865ec6404 to 9bc9e48fe908 (2 revisions) (cla: yes, waiting for tree to go green)

24845 Only call destruction_callback if non-null (cla: yes)

24846 Fix typo in assertion log message (cla: yes)

24847 Roll Dart SDK from 9bc9e48fe908 to b191fb71063c (1 revision) (cla: yes, waiting for tree to go green)