39769 remove input files argument to target (cla: yes, tool)

39772 These Catalina tests are no longer flaky. (cla: yes, team)

39774 workaround for mangled web sdk source map packages (cla: yes, tool)

39776 handle browser refresh (cla: yes, tool)

39778 Revert “Replace deprecated onReportTimings w/ frameTimings” (a: tests, cla: yes, framework)

39780 Updates CORS origin for snippets to a wildcard. (cla: yes, team)

39781 Add lib/generated_plugin_registrant.dart to gitignore (cla: yes, tool)

39782 Allow specifying a project for Xcode getInfo (cla: yes, tool)

39783 Hotfix for 1.9.1 (cla: yes, engine)