KeyedStoreIC: support non-generic handling of Symbol keys

KeyedStoreIC: support non-generic handling of Symbol keys

BUG=chromium:450475
LOG=n

Committed: https://crrev.com/89dff787e3c80d793f15a2ff9a5c65b3b2398c89
Cr-Commit-Position: refs/heads/master@{#26188}

[Jakob Kummerow, 2015-01-21 10:18:14]

jkummerow@chromium.org changed reviewers:
+ verwaest@chromium.org

[Toon Verwaest, 2015-01-21 10:21:51]

lgtm

[Jakob Kummerow, 2015-01-21 10:23:58]

The CQ bit was checked by jkummerow@chromium.org

[commit-bot: I haz the power, 2015-01-21 10:24:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/856333002/1

[commit-bot: I haz the power, 2015-01-21 11:15:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-21 11:15:08]

Try jobs failed on following builders:
  v8_linux_arm_rel on tryserver.v8
(http://build.chromium.org/p/tryserver.v8/builders/v8_linux_arm_rel/builds/826)

[Jakob Kummerow, 2015-01-21 13:07:48]

The CQ bit was checked by jkummerow@chromium.org

[commit-bot: I haz the power, 2015-01-21 13:08:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/856333002/1

[commit-bot: I haz the power, 2015-01-21 13:39:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-21 13:39:38]

Patchset 1 (id:??) landed as
https://crrev.com/89dff787e3c80d793f15a2ff9a5c65b3b2398c89
Cr-Commit-Position: refs/heads/master@{#26188}