Revert of Flip Google Chrome Linux x64 bot from GYP to GN.

Revert of Flip Google Chrome Linux x64 bot from GYP to GN. (patchset #1 id:1 of https://codereview.chromium.org/1377533002/ )

Reason for revert:
This causes compile error on linux.
http://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux/builds/42676

Original issue's description:
> Flip Google Chrome Linux x64 bot from GYP to GN.
>
> This is on the chromium.chrome waterfall.
>
> R=brettw@chromium.org
> BUG=432959
>
> Committed: https://crrev.com/05ae5552d40ed73a8b7c1e9222caa30806682f73
> Cr-Commit-Position: refs/heads/master@{#351222}

TBR=brettw@chromium.org,dpranke@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=432959
Committed: https://crrev.com/255d29596dd6e34065a6782c1d163543c4520224
Cr-Commit-Position: refs/heads/master@{#351229}

[yoichio, 2015-09-29 01:46:46]

Created Revert of Flip Google Chrome Linux x64 bot from GYP to GN.

[commit-bot: I haz the power, 2015-09-29 01:47:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1372323003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1372323003/1

[commit-bot: I haz the power, 2015-09-29 01:49:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-29 01:50:02]

Patchset 1 (id:??) landed as
https://crrev.com/255d29596dd6e34065a6782c1d163543c4520224
Cr-Commit-Position: refs/heads/master@{#351229}

[Dirk Pranke, 2015-09-29 02:16:08]

On 2015/09/29 01:50:02, commit-bot: I haz the power wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/255d29596dd6e34065a6782c1d163543c4520224
> Cr-Commit-Position: refs/heads/master@{#351229}

lgtm