X87: [builtins] Add support for NewTarget to Execution::New.

X87: [builtins] Add support for NewTarget to Execution::New.

port 1dfac69f1fb5ad8e2db2d5be591c094def55d451 (r30857).

original commit message:

    Introduce new builtins Construct and ConstructFunction (in line
    with the Call and CallFunction builtins that we already have) as
    proper bottleneck for Construct and [[Construct]] on JSFunctions.
    Use these builtins to support passing NewTarget from C++ to
    JavaScript land.

    Long-term we want the CallConstructStub to be used for
    gathering feedback on entry to construction chain (i.e. the
    initial new Foo), and use the Construct builtins to do the
    actual work inside the construction chain (i.e. calling into
    super and stuff).

BUG=

Committed: https://crrev.com/5ced12c154a88058ce5b83ccbaaefb0e8edd6ef2
Cr-Commit-Position: refs/heads/master@{#30899}

[chunyang.dai, 2015-09-23 06:25:05]

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

[chunyang.dai, 2015-09-23 06:25:05]

ptal

[Weiliang, 2015-09-24 03:21:18]

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

[Weiliang, 2015-09-24 03:21:18]

lgtm

[Weiliang, 2015-09-24 03:21:19]

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

[Weiliang, 2015-09-24 03:21:19]

lgtm

lgtm

[commit-bot: I haz the power, 2015-09-24 03:21:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1362573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1362573002/1

[commit-bot: I haz the power, 2015-09-24 03:52:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-24 03:52:09]

Patchset 1 (id:??) landed as
https://crrev.com/5ced12c154a88058ce5b83ccbaaefb0e8edd6ef2
Cr-Commit-Position: refs/heads/master@{#30899}