Revert of Copy debug PNaCl plugin in Dev builds of the chromoting webapp.

Revert of Copy debug PNaCl plugin in Dev builds of the chromoting webapp. (patchset #1 id:1 of https://codereview.chromium.org/872633006/)

Reason for revert:
Broke compile, e.g. http://build.chromium.org/p/chromium/buildstatus?builder=Win&number=28337

Original issue's description:
> Copy debug PNaCl plugin in Dev builds of the chromoting webapp.
>
> With this change the Debug version of the PNaCl plugin will be copied to
> the webapp directory allowing to debug PNaCl plugin (using nacl-gdb).
>
> Also updated build-webapp.py to process all *.jinja2 input files as jinja2
> templates.
>
> BUG=451643
>
> Committed: https://crrev.com/65ffdafc8538b14ad0cbdf6a57d9d21e1e882a9d
> Cr-Commit-Position: refs/heads/master@{#313024}

TBR=jamiewalch@chromium.org,sergeyu@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=451643
Committed: https://crrev.com/c82e9b0a281f21501765b27a23cda508e11a5e1f
Cr-Commit-Position: refs/heads/master@{#313025}

[Sergiy Byelozyorov, 2015-01-24 19:29:53]

Created Revert of Copy debug PNaCl plugin in Dev builds of the chromoting
webapp.

[commit-bot: I haz the power, 2015-01-24 19:30:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/870273002/1

[commit-bot: I haz the power, 2015-01-24 19:31:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-24 19:32:34]

Patchset 1 (id:??) landed as
https://crrev.com/c82e9b0a281f21501765b27a23cda508e11a5e1f
Cr-Commit-Position: refs/heads/master@{#313025}