trial run of vs2013 with iterator debugging off to see if browser_tests are timing-related

BUG=

Review URL: https://codereview.chromium.org/165693005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252837 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252837