This reverts commit 254369a5f6df06c2c6be067d14c2cb2a036ba173.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> bindings: Implement timers with V8Function
>
> This fixes bug 866610 by using the IDL infrastructure to properly enter
> the v8::Context before calling the registered callback.
>
> Also ensure eager finalization of ScheduledAction in DOMTimer to
> prevent a memory leak. Added two more effective DCHECKs to confirm.
>
> Bug: 866610
> Change-Id: I37d7bd05f035fe31856cfe68bae51aa0632cd3b1
> Reviewed-on: https://chromium-review.googlesource.com/1220486
> Reviewed-by: Nate Chapin <japhet@chromium.org>
> Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
> Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
> Commit-Queue: Timothy Gu <timothygu@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#593108}

TBR=peria@chromium.org,yukishiino@chromium.org,haraken@chromium.org,japhet@chromium.org,timothygu@chromium.org

Change-Id: Ifaccc3374466b851fc28b10c63ed1397bdae635e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 866610
Reviewed-on: https://chromium-review.googlesource.com/1239216
Reviewed-by: Frank Liberato <liberato@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593260}