chromeos: remove power manager EXPECTs from login_browsertest
chromeos: remove power manager EXPECTs from login_browsertest

BUG=106061
TEST=browser tests should pass

Signed-off-by: Simon Que <sque@chromium.org>

R=oshima@chromium.org,satorux@chromium.org,nkostylev@chromium.org


Review URL: http://codereview.chromium.org/8773016

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@112551 0039d316-1c4b-4281-b951-d872f2087c98

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