Revert 165866
> Disable threaded compositing when texture sharing is blacklisted
> 
> When texture_sharing is blacklisted, we can't do readbacks from the
> browser process and thus hit the render process to do readbacks for
> the thumbnailer or the extensions getVisibleTab() API. This path is
> a bit buggy in threaded compositing mode, so disable the thread.
> 
> BUG=158747
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/11361077

TBR=jamesr@chromium.org
BUG=163046
Review URL: https://codereview.chromium.org/11280272

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170700 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed