Prepare layout test expectations for RegExp changes in V8.
Prepare layout test expectations for RegExp changes in V8.

R=machenbach@chromium.org
BUG=chromium:551272
NOTRY=true

Review URL: https://codereview.chromium.org/1415843009

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#357780}

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