ChromeOS default switches cleanup - switches::kEnableThreadedCompositing and switches::kEnableSmoothScrolling should not be an option on ChromeOS anymore.

BUG=170948
TEST=existing tests


Review URL: https://chromiumcodereview.appspot.com/11938025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@177859 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed