Disable omnibox.OmniboxTest.testOmniboxSearchHistory on chromeos too
Disable omnibox.OmniboxTest.testOmniboxSearchHistory on chromeos too

It's already disabled on linux, so I don't expect it to work on chrome.s

R=dennisjeffrey@chromium.org
BUG=91033
TEST=

Review URL: http://codereview.chromium.org/8989026

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@115162 0039d316-1c4b-4281-b951-d872f2087c98

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