Disable file browser tests on chromeos
Disable file browser tests on chromeos

R=frankf@chromium.org
BUG=chromium-os:26669
TEST=

Review URL: https://chromiumcodereview.appspot.com/9522001

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@124080 0039d316-1c4b-4281-b951-d872f2087c98

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