Hook up the presubmit check for empty descriptions.

BUG=none
TEST=none
NOTRY=true

Review URL: http://codereview.chromium.org/8812001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113063 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -324,6 +324,8 @@ def CheckChangeOnCommit(input_api, output_api):
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasTestField(
       input_api, output_api))
+  results.extend(input_api.canned_checks.CheckChangeHasDescription(
+      input_api, output_api))
   results.extend(_CheckSubversionConfig(input_api, output_api))
   return results