https://people.mozilla.org/~jorendorff/es6-draft.html#sec-function.prototype.bind

Bound functions should have a name based on the function that was
bound.

This reverts the revert f2747ed9. The original
CL was reverted because the Blink layout test broke. I have a CL that disables
these tests at: https://codereview.chromium.org/1196753003/

BUG=N
LOG=N
R=adamk
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1195983002

Cr-Commit-Position: refs/heads/master@{#29193}