49758 Roll engine 6007c17fd246..6061b804e359 (1 commits) (autoroller: commit, cla: yes)

49760 Fix handling backspace on macos with text selection (cla: yes, framework, waiting for tree to go green)

49766 add preserveHeaderCase argument to subclasses of HttpHeaders (a: tests, cla: yes, framework, tool, waiting for tree to go green)

49771 Assert cache hints are not set for null painters (cla: yes, framework, perf: speed, severe: API break, severe: performance, waiting for tree to go green)

49799 Roll engine 6061b804e359..f6526c0cf8a3 (7 commits) (autoroller: commit, cla: yes)