[DevTools] Unflake ../debugger-pause/pause-on-elements-panel.html on Trusty
[DevTools] Unflake ../debugger-pause/pause-on-elements-panel.html on Trusty

BUG=498777
TBR=dgozman@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1882873003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#387080}

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