Made _discard_pending() always post a message. Added meaningful
default messages to all the places where it is called in the code.  In
particular, CQ will now always post a message whenever the Commit
checkbox is unchecked, for any reason.

Updated unit tests accordingly, and made them a bit more robust by
adding an error message to the failing FakeVerifier.

This does NOT fix the bug, but will hopefully give more visibility to
developers when a CL is dropped.


Review URL:

git-svn-id: svn:// 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed