24934 [web] Add few awaits in history tests (affects: tests, cla: yes, platform-web, waiting for tree to go green)

24936 Roll Skia from 93330c9c4dc7 to cc185c5a31f3 (5 revisions) (cla: yes, waiting for tree to go green)

24937 Roll Dart SDK from f596cf76c722 to 22d0f712b0a6 (1 revision) (cla: yes, waiting for tree to go green)

24941 Roll Skia from cc185c5a31f3 to 43bde9d2bc82 (5 revisions) (cla: yes, waiting for tree to go green)