[runtime] Add fast path to update LookupIterator in simple cases

[runtime] Add fast path to update LookupIterator in simple cases

By not calling ReloadPropertyInformation, we avoid expensive descriptor array lookup.

BUG=

Committed: https://crrev.com/4c41d007d932ed6eba7514f2d4e44def61cd5fb8
Cr-Commit-Position: refs/heads/master@{#33995}

[Toon Verwaest, 2016-02-15 13:07:49]

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

[Toon Verwaest, 2016-02-15 13:07:50]

ptal

[Camillo Bruni, 2016-02-15 13:44:16]

lgtm

[Toon Verwaest, 2016-02-15 13:52:32]

The CQ bit was checked by verwaest@chromium.org

[commit-bot: I haz the power, 2016-02-15 13:52:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1697153002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1697153002/1

[commit-bot: I haz the power, 2016-02-15 14:13:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-02-15 14:14:28]

Description was changed from

==========
[runtime] Add fast path to update LookupIterator in simple cases

By not calling ReloadPropertyInformation, we avoid expensive descriptor array
lookup.

BUG=
==========

to

==========
[runtime] Add fast path to update LookupIterator in simple cases

By not calling ReloadPropertyInformation, we avoid expensive descriptor array
lookup.

BUG=

Committed: https://crrev.com/4c41d007d932ed6eba7514f2d4e44def61cd5fb8
Cr-Commit-Position: refs/heads/master@{#33995}
==========

[commit-bot: I haz the power, 2016-02-15 14:14:28]

Patchset 1 (id:??) landed as
https://crrev.com/4c41d007d932ed6eba7514f2d4e44def61cd5fb8
Cr-Commit-Position: refs/heads/master@{#33995}