X87: [es6] Spread in array literals

X87: [es6] Spread in array literals

port 9502e91adbed48a546463aa848656d07619d14e6 (r28534)

original commit message:

    This allows you to put iterables into your array literals
    and the will get spread into the array.

      let x = [0, ...range(1, 3)];  // [0, 1, 2]

    This is done by treating the array literal up to the first
    spread element as usual, including using a boiler plate
    array, and then appending the remaining expressions and rest
    expressions.

BUG=

Committed: https://crrev.com/83321b09ed5764be4d44a6ca7647d184b495732b
Cr-Commit-Position: refs/heads/master@{#28606}

[chunyang.dai, 2015-05-22 07:23:46]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-05-22 07:23:46]

PTAL

[Weiliang, 2015-05-25 12:51:04]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-05-25 12:51:04]

lgtm

[commit-bot: I haz the power, 2015-05-25 12:51:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1152173002/1

[commit-bot: I haz the power, 2015-05-25 13:15:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-25 13:15:32]

Patchset 1 (id:??) landed as
https://crrev.com/83321b09ed5764be4d44a6ca7647d184b495732b
Cr-Commit-Position: refs/heads/master@{#28606}