The generic implementations for typeof, strict equality and ToBoolean
don't need a context, so we can just pass the NoContextConstant (which
is Smi zero) instead, to reduce the live ranges for the context.

R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2400633002
Cr-Commit-Position: refs/heads/master@{#40027}