The file view offset isn't an optional value, so don't make `FileView::view` optional.
The file view offset isn't an optional value, so don't make `FileView::view` optional.

DiamondLovesYou/rust-ppapi,DiamondLovesYou/rust-ppapi,DiamondLovesYou/rust-ppapi,DiamondLovesYou/rust-ppapi