CrOS: Remove a DCHECK causing test failures in DBus on Aura
CrOS: Remove a DCHECK causing test failures in DBus on Aura

The tests run fine without this check, and we've filed a bug to investigate further.

BUG=chromium-os:23416
TEST=browser_tests


Review URL: http://codereview.chromium.org/8682028

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@111498 0039d316-1c4b-4281-b951-d872f2087c98

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