Convert KeyedLoad indexed interceptor case to a Handler.

Convert KeyedLoad indexed interceptor case to a Handler.

Currently, KeyedLoads on objects with indexed interceptors are handled with a
special stub. Instead, key on the map and handler mechanism for more uniform
treatment.

R=verwaest@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=24042

[mvstanton, 2014-09-18 08:07:43]

Hi Toon, here is the second in the series of two CLs we discussed, this one
converting the indexed interceptor to a handler.

The handler is simpler because it doesn't need to introspect on the map, it's
just a smi-check and tail call. I thought about Hydrogenizing it, but I'd have
to add tail call support to CallRuntime. Could do, could do. WDYT? PTAL!
--Michael

[Toon Verwaest, 2014-09-18 11:58:37]

lgtm

[mvstanton, 2014-09-18 13:03:19]

Patchset #2 (id:20001) has been deleted

[mvstanton, 2014-09-18 13:28:48]

Committed patchset #2 (id:40001) manually as 24042 (presubmit successful).