webkit: Kill support/ directory.

- Rename webkit_support.gyp to webkit_glue.gyp
- Move it into glue/ directory.
- Remove DEPS and OWNERS file.

BUG=265753
R=darin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23583055

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224864 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224864
Delete the omahaproxy-backed extension blacklist and clear its entries from the
preferences file.

BUG=295882, 292673
R=shess@chromium.org, yoz@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23591050

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224865 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224865