Add GPU job object restriction
Add GPU job object restriction

Use the job object to prevent the GPU from spawning child processes on Windows.

BUG=None.
TEST=None.
Review URL: http://codereview.chromium.org/7768004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@98677 0039d316-1c4b-4281-b951-d872f2087c98

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