Ensure that render surface layer list is not dirty/empty before hit testing for touch events



BUG=167135


Review URL: https://chromiumcodereview.appspot.com/11776033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@175500 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed