Implement support for touch-action: pan-x/pan-y in chromium

BUG=321643

Review URL: https://codereview.chromium.org/93733005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242147 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242147