[crankshaft] Generalize PropertyAccessInfo to Name (so it can deal with symbols).

[crankshaft] Generalize PropertyAccessInfo to Name (so it can deal with symbols).

This doesn't fix the performance regression mentioned by the bug yet,
but is necessary cleanup to land the fix, and should be separated from
the actual fix.

R=jkummerow@chromium.org
BUG=chromium:534200
LOG=n

Committed: https://crrev.com/704e3d809b071ad3a4a5331a01768a004069a429
Cr-Commit-Position: refs/heads/master@{#30847}

[Benedikt Meurer, 2015-09-21 12:28:41]

Hey Jakob,

As discussed offline, this is the initial CL for PropertyAccessInfo. The
performance regression fix will be separate CL.
Please take a look.

Thanks,
Benedikt

[Jakob Kummerow, 2015-09-21 12:48:44]

LGTM. About as easy as I was hoping :-)

[Benedikt Meurer, 2015-09-21 12:49:16]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-09-21 12:49:19]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1345313005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1345313005/1

[commit-bot: I haz the power, 2015-09-21 12:58:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-21 12:58:27]

Patchset 1 (id:??) landed as
https://crrev.com/704e3d809b071ad3a4a5331a01768a004069a429
Cr-Commit-Position: refs/heads/master@{#30847}