Removed valgrind suppression.
Removed valgrind suppression.

The GPU watchdog thread that seemed to cause this error is now disabled when running with valgrind. Leaks are expected when the watchdog aborts the GPU process.

TEST=mac_valgrind
BUG=58245

Review URL: http://codereview.chromium.org/5027003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@66335 0039d316-1c4b-4281-b951-d872f2087c98

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