[turbofan] Initial support for the %_DateField intrinsic.

[turbofan] Initial support for the %_DateField intrinsic.

This only introduces better typing and lowering for access to the value
field.

R=jarin@chromium.org

Committed: https://crrev.com/5eafd7a3d95d9ed1e5f1f11a1ea408a1415da2a8
Cr-Commit-Position: refs/heads/master@{#28836}

[Benedikt Meurer, 2015-06-08 10:46:03]

Hey Jaro,

Initial %_DateField steps. Please take a look.

Thanks,
Benedikt

[Jarin, 2015-06-08 10:50:01]

lgtm

[Benedikt Meurer, 2015-06-08 10:51:04]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-06-08 10:51:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169723002/1

[commit-bot: I haz the power, 2015-06-08 11:00:43]

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

[commit-bot: I haz the power, 2015-06-08 11:00:44]

Try jobs failed on following builders:
  v8_win_nosnap_shared_compile_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_nosnap_shared_compil...)
  v8_win_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_win_rel/builds/6514)

[Benedikt Meurer, 2015-06-08 11:03:18]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2015-06-08 11:03:18]

The patchset sent to the CQ was uploaded after l-g-t-m from jarin@chromium.org
Link to the patchset: https://codereview.chromium.org/1169723002/#ps20001
(title: "Attempt to fix Windows.")

[commit-bot: I haz the power, 2015-06-08 11:03:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169723002/20001

[Benedikt Meurer, 2015-06-08 11:47:36]

Committed patchset #2 (id:20001) manually as
5eafd7a3d95d9ed1e5f1f11a1ea408a1415da2a8 (presubmit successful).

[commit-bot: I haz the power, 2015-06-08 11:47:36]

Patchset 2 (id:??) landed as
https://crrev.com/5eafd7a3d95d9ed1e5f1f11a1ea408a1415da2a8
Cr-Commit-Position: refs/heads/master@{#28836}