Put the grab timeout back to 30seconds.
Put the grab timeout back to 30seconds.

 I haven't heard any locker related issue so far, and stephane applied X patch that
fixes a grab related bug ni X, so I decided to put this back now and see if we still
have this issue.

BUG=chromium-os:11453
TEST=none

R=cmasone@chromium.org

Review URL: http://codereview.chromium.org/6829001

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@81327 0039d316-1c4b-4281-b951-d872f2087c98

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