CQ: catch more errors (IOError in this case, mostly for socket errors).

Note that while some errors are indeed socket.error, sometimes we get
IOError which is a superclass of socket.error so just catching that
makes the code simpler.

BUG=none

Review URL: https://codereview.chromium.org/78773006

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/commit-queue@236367 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed