28674 Roll Skia from 4f3ca106c9d8 to 941812fdcc84 (4 revisions) (cla: yes, waiting for tree to go green)

28675 [web] clear surfaces on hot restart (cla: yes, platform-web, needs tests)

28676 fuchsia: Convert vulkan headers to DEPS (cla: yes, platform-fuchsia)

28678 Roll Dart SDK from 4aff633d5ef2 to 1874cf447307 (2 revisions) (cla: yes, waiting for tree to go green)

28679 hold DisplayList objects in SkiaGPUObject wrappers (cla: yes, waiting for tree to go green)