Change task timeout limit to 3 days

appengine/swarming/server/task_request.py

Index: appengine/swarming/server/task_request.py
diff --git a/appengine/swarming/server/task_request.py b/appengine/swarming/server/task_request.py
index 063fc2645531e0582db07c00d31f2dcc2e577fdb..944b0d1b857e11866bd9b0853c5b2633b3c8e07e 100644
--- a/appengine/swarming/server/task_request.py
+++ b/appengine/swarming/server/task_request.py
@@ -75,8 +75,8 @@ import cipd
 MAXIMUM_PRIORITY = 255
 
 
-# One day in seconds. Add 10s to account for small jitter.
-_ONE_DAY_SECS = 24*60*60 + 10
+# Three days in seconds. Add 10s to account for small jitter.
+_THREE_DAY_SECS = 3*24*60*60 + 10
 
 
 # Seven day in seconds. Add 10s to account for small jitter.
@@ -227,10 +227,10 @@ def _validate_task_run_id(_prop, value):
 
 def _validate_timeout(prop, value):
   """Validates timeouts in seconds in TaskProperties."""
-  if value and not (_MIN_TIMEOUT_SECS <= value <= _ONE_DAY_SECS):
+  if value and not (_MIN_TIMEOUT_SECS <= value <= _THREE_DAY_SECS):
     # pylint: disable=W0212
     raise datastore_errors.BadValueError(
-        '%s (%ds) must be 0 or between %ds and one day' %
+        '%s (%ds) must be 0 or between %ds and three days' %
             (prop._name, value, _MIN_TIMEOUT_SECS))