Alex Crichton b9c27b93a5 Update all non-mutable slices into Rust to use AllocCopy
This commit migrates all non-mutable slices incoming into Rust to use
the standard `AllocCopy` binding instead of using a custom `Slice`
binding defined by `wasm-bindgen`. This is done by freeing the memory
from Rust rather than freeing the memory from JS. We can't do this for
mutable slices yet but otherwise this should be working well!
2019-06-25 05:44:32 -07:00
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