Cache function templates in PluginObject to avoid memory leak.

Cache function templates in PluginObject to avoid memory leak.

Without caching, each call to PluginObject::GetPropertyOrMethod creates
a new function template. V8 stores all function templates internally
for the lifetime of the web-page.

BUG=439966
Committed: https://crrev.com/e85e45ea01bd4aeef48bf991012b198f7316470c
Cr-Commit-Position: refs/heads/master@{#307691}

[ulan, 2014-12-09 09:47:11]

ulan@chromium.org changed reviewers:
+ jochen@chromium.org

[ulan, 2014-12-09 09:47:11]

PTAL

[jochen (gone - plz use gerrit), 2014-12-09 15:57:38]

lgtm

[ulan, 2014-12-10 09:57:23]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2014-12-10 09:58:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785213002/1

[commit-bot: I haz the power, 2014-12-10 11:28:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-12-10 11:28:47]

Try jobs failed on following builders:
  linux_chromium_asan_rel on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[ulan, 2014-12-10 12:35:31]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2014-12-10 12:36:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785213002/1

[ulan, 2014-12-10 12:38:13]

The CQ bit was unchecked by ulan@chromium.org

[ulan, 2014-12-10 12:42:47]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2014-12-10 12:43:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785213002/20001

[commit-bot: I haz the power, 2014-12-10 13:41:27]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-12-10 13:42:03]

Patchset 2 (id:??) landed as
https://crrev.com/e85e45ea01bd4aeef48bf991012b198f7316470c
Cr-Commit-Position: refs/heads/master@{#307691}