disable Vp8QuantizerParserTest.VariedQuantizer test on Thread Sanitizer
disable Vp8QuantizerParserTest.VariedQuantizer test on Thread Sanitizer

TBR=xjz@chromium.org
BUG=537635

Review URL: https://codereview.chromium.org/1378093003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#351574}

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