Attempt at fixing precise64 build

TBR=jianli@chromium.org

BUG=324982

Review URL: https://codereview.chromium.org/121443002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242627 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242627