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This test is not possible with ubercomp, which is always on in aura.
So disable the test. It should just go away entirely once all platforms
are using ubercomp.

R=piman
BUG=272379,270918

Review URL: https://codereview.chromium.org/132963006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245587 0039d316-1c4b-4281-b951-d872f2087c98