Don't prompt developers to add blank test= or bug= lines.

presubmit_canned_checks.py

 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 ### Description checks
 
 def CheckChangeHasTestField(input_api, output_api):
   """Requires that the changelist have a TEST= field."""
   if input_api.change.TEST:
     return []
   else:
     return [output_api.PresubmitNotifyResult(
-        'Changelist should have a TEST= field. TEST=none is allowed.')]
+        'If this change requires manual test instructions to QA team, add '
+        'TEST=[instructions].')]
 
 
 def CheckChangeHasBugField(input_api, output_api):
   """Requires that the changelist have a BUG= field."""
   if input_api.change.BUG:
     return []
   else:
     return [output_api.PresubmitNotifyResult(
-        'Changelist should have a BUG= field. BUG=none is allowed.')]
+        'If this change has an associated bug, add BUG=[bug number].')]
 
 
 def CheckChangeHasTestedField(input_api, output_api):
   """Requires that the changelist have a TESTED= field."""
   if input_api.change.TESTED:
     return []
   else:
     return [output_api.PresubmitError('Changelist must have a TESTED= field.')]
 
 
@@ skipping 569 matching lines @@
     pending_builds_len = len(builder.get('pending_builds', []))
     if pending_builds_len > max_pendings:
       out.append('%s has %d build(s) pending' %
                   (builder_name, pending_builds_len))
   if out:
     return [output_api.PresubmitPromptWarning(
         'Build(s) pending. It is suggested to wait that no more than %d '
             'builds are pending.' % max_pendings,
         long_text='\n'.join(out))]
   return []