imageupload: chunked upload, video
imageupload: chunked upload, video

Former-commit-id: 896a3bb6234ee53df83a47771027325c1d8b6a90 [formerly ff3f16394072e5ec93a2a93cbbced0e54b47b542]
Former-commit-id: 356faf981ee508ae32f33dc24e15fa71160f7eaa
torhve/ivar2,torhve/ivar2,torhve/ivar2,haste/ivar2