Remove flag DISABLE_ROUNDED_CORNER_CLIPPING.

It has been disabled in http://trac.webkit.org/changeset/130355 and is no longer needed.

BUG=

Review URL: https://chromiumcodereview.appspot.com/15492005

git-svn-id: svn://svn.chromium.org/blink/trunk@150729 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed