Revert of Replace enable-compositing-for-fixed-position with prefer-compositing-to-lcd-text.

Revert of Replace enable-compositing-for-fixed-position with prefer-compositing-to-lcd-text. (patchset #1 of https://codereview.chromium.org/479653003/)

Reason for revert:
Reverting due to compile step failure on Linux ChromiumOS Builder (dbg) (see http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Builder%20%28dbg%29/builds/50238).

Original issue's description:
> Replace enable-compositing-for-fixed-position with prefer-compositing-to-lcd-text.
> 
> We are adding a --prefer-compositing-to-lcd-text flag to allow promoting
> of things that will lose LCD text. Fixed position elements will be the
> only thing controlled by this flag in this CL. Other flags will be
> merged into it in the future.
> 
> R=piman@chromium.org
> BUG=365851
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290155

TBR=piman@chromium.org,rsesek@chromium.org,sky@chromium.org,danakj@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=365851
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290156

[tdanderson, 2014-08-16 20:42:08]

Created Revert of Replace enable-compositing-for-fixed-position with
prefer-compositing-to-lcd-text.

[commit-bot: I haz the power, 2014-08-16 20:43:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tdanderson@chromium.org/484473002/1

[commit-bot: I haz the power, 2014-08-16 20:43:33]

Committed patchset #1 (1) as 290156