Make apply calls with double array arguments such as
Math.min.apply(Math, [1.1, 2.2]) 1.6x faster.

Drive-by-fix: pass in the isolate to ElementsAccessor::GetImpl.

BUG=v8:4826

Review-Url: https://codereview.chromium.org/2521043005
Cr-Commit-Position: refs/heads/master@{#41268}