Before this change, named queries searches for changes based on the
queries defined by the current user. This change makes it possible
to search for changes based on queries defined by other users.
This feature can be used to allow users to define personal sets of
queries that interest them, perhaps queries that they would
like to watch, or review, and it allows them to share those sets with
other users.
Feature: Issue 13336
Change-Id: I57981a238d3b5d233714ce4754953f0d85a57941
6b327b9197