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The memory allocated by AllocAndCopyName was not being freed
if the in-process policy engine did not allow the request to
query the broker.

This was nicely reported by typo.pl@gmail.com

TEST=see bug
BUG=414039

Review URL: https://codereview.chromium.org/575623004

Cr-Commit-Position: refs/heads/master@{#295220}