Remove the disable for recent blur optimizations, since it has been upstreamed to Blink.

BUG=

Review URL: https://codereview.chromium.org/62813002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233689 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233690 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233690