- Use CallCFunction to call C implementation of copying elements for
slice, instead of Runtime call
- Copy elements without allocating handles when copying different types
of typed arrays

Bug: v8:5929
Change-Id: Icd4fed8846542e71b623e600ba9aaac64062f0d4
Reviewed-on: https://chromium-review.googlesource.com/920563
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51415}