Cache locally function templates returned by gin::CreateFunctionTemplate

Cache locally function templates returned by gin::CreateFunctionTemplate

V8 caches FunctionTemplates for a lifetime of a web page for its own internal
reasons, thus it is generally a good idea to cache the template returned by
gin::CreateFunctionTemplate function. Otherwise, repeated method invocations
from JS will create substantial memory leaks.

BUG=463487
Committed: https://crrev.com/48a180623e4e2b4d3dc32d19281d617603218000
Cr-Commit-Position: refs/heads/master@{#321330}

[mnaganov (inactive), 2015-03-04 17:27:19]

mnaganov@chromium.org changed reviewers:
+ raymes@chromium.org

[mnaganov (inactive), 2015-03-06 09:50:51]

raymes@: Ping!

[raymes, 2015-03-18 23:19:09]

lgtm

[raymes, 2015-03-18 23:21:07]

On 2015/03/18 23:19:09, raymes wrote:
> lgtm

and again, I'm really sorry for the long delay! :(

[mnaganov (inactive), 2015-03-19 08:47:03]

The CQ bit was checked by mnaganov@chromium.org

[commit-bot: I haz the power, 2015-03-19 08:47:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/974183005/1

[commit-bot: I haz the power, 2015-03-19 10:36:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 10:37:36]

Patchset 1 (id:??) landed as
https://crrev.com/48a180623e4e2b4d3dc32d19281d617603218000
Cr-Commit-Position: refs/heads/master@{#321330}