Revert 229806 "Statically enable TCM and get rid of compositing-..."

> Statically enable TCM and get rid of compositing-mode-field-trials.
> 
> This is based on top of https://codereview.chromium.org/27197009/
> 
> TBR=joi
> BUG=302738, 233830, 306557
> 
> Review URL: https://codereview.chromium.org/26389003

TBR=gab@chromium.org

Review URL: https://codereview.chromium.org/33663002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229907 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229907