Handle SSL timeouts in Rietveld requests.

BUG=346845
R=maruel@chromium.org

Review URL: https://codereview.chromium.org/180273003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@253271 0039d316-1c4b-4281-b951-d872f2087c98

rietveld.py

@@ -18,6 +18,7 @@ import copy
 import json
 import logging
 import re
+import ssl
 import time
 import urllib2
 
@@ -405,6 +406,11 @@ class Rietveld(object):
               not 'EOF occurred in violation of protocol' in e.reason):
             # Usually internal GAE flakiness.
             raise
+        except ssl.SSLError, e:
+          if retry >= (maxtries - 1):
+            raise
+          if not 'timed out' in e.reason:
+            raise
         # If reaching this line, loop again. Uses a small backoff.
         time.sleep(1+maxtries*2)
     finally: