Hide native Date implementation in function context.

Hide native Date implementation in function context.

This further reduces the context size.

R=jkummerow@chromium.org

Committed: https://crrev.com/9333e7e1359e2676307ae148c3fbde81b26b18e1
Cr-Commit-Position: refs/heads/master@{#27138}

[Yang, 2015-03-11 15:16:09]

Log output when running mksnapshot with --profile-deserialization

Deserialization will reserve:
  806680 bytes for startup
  323736 bytes per context
Snapshot blob consists of
  493360 bytes for startup
  100368 bytes for context

Deserialization will reserve:
  804392 bytes for startup
  244176 bytes per context
Snapshot blob consists of:
  491128 bytes for startup
   94752 bytes for context

[Jakob Kummerow, 2015-03-11 15:46:55]

LGTM with a comment.

https://codereview.chromium.org/996213003/diff/20001/src/i18n.js
File src/i18n.js (right):

https://codereview.chromium.org/996213003/diff/20001/src/i18n.js#newcode19
src/i18n.js:19: var undefined = global.undefined;
How about just dropping this? Shouldn't make a difference, right?

[Yang, 2015-03-11 15:51:56]

On 2015/03/11 15:46:55, Jakob wrote:
> LGTM with a comment.
> 
> https://codereview.chromium.org/996213003/diff/20001/src/i18n.js
> File src/i18n.js (right):
> 
> https://codereview.chromium.org/996213003/diff/20001/src/i18n.js#newcode19
> src/i18n.js:19: var undefined = global.undefined;
> How about just dropping this? Shouldn't make a difference, right?

As discussed offline, undefined is not available otherwise.

[Yang, 2015-03-11 15:52:04]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-03-11 15:52:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/996213003/20001

[commit-bot: I haz the power, 2015-03-11 15:53:29]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-11 15:53:48]

Patchset 2 (id:??) landed as
https://crrev.com/9333e7e1359e2676307ae148c3fbde81b26b18e1
Cr-Commit-Position: refs/heads/master@{#27138}