Revert of Enable display list 2D canvas by default

Revert of Enable display list 2D canvas by default (patchset #1 id:1 of https://codereview.chromium.org/818443002/)

Reason for revert:
Speculative revert.

Causing blink_perf.canvas to fail on Linux and Mac

http://build.chromium.org/p/chromium.perf/builders/Mac%2010.8%20Perf%20%281%29/builds/1403
http://build.chromium.org/p/chromium.perf/builders/Linux%20Perf%20%281%29/builds/4504

Original issue's description:
> Enable display list 2D canvas by default
>
> With this change, display list 2D canvas will become enabled by
> default in Chrome. Content shell with --dump-render-tree will
> continue to have display lists disabled by default.
> Currently, having display lists enabled in blink means
> that display lists will be used whenever 2d canvases would
> not be GPU-accelerated.
>
> BUG=386601
>
> Committed: https://crrev.com/f98a302c6231cd607bb64eeadc5233ca858e3e8e
> Cr-Commit-Position: refs/heads/master@{#309069}

TBR=avi@chromium.org,junov@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=386601, 443825
Committed: https://crrev.com/d5969b74ddd583114021790f23774946be2eae58
Cr-Commit-Position: refs/heads/master@{#309119}

[fmeawad, 2014-12-19 00:51:27]

Created Revert of Enable display list 2D canvas by default

[commit-bot: I haz the power, 2014-12-19 00:52:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/814163002/1

[commit-bot: I haz the power, 2014-12-19 00:53:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-19 00:54:22]

Patchset 1 (id:??) landed as
https://crrev.com/d5969b74ddd583114021790f23774946be2eae58
Cr-Commit-Position: refs/heads/master@{#309119}