suppress memory leaks from message_center_view_unittest.cc
suppress memory leaks from message_center_view_unittest.cc

TBR=yoshiki@chromium.org
BUG=537626
NOTRY=true

Review URL: https://codereview.chromium.org/1375273002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#351566}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk