This patch re-commits a previous commit after fixing a test to not
run into another known bug.
This reverts commit b104a67e.

This patch implements the last two methods on TypedArrays. These
were previously committed and led to a test failure.

BUG=v8:3578
LOG=Y
R=adamk

Review URL: https://codereview.chromium.org/1159663004

Cr-Commit-Position: refs/heads/master@{#28803}