DevTools: Fix 359994, Crash Report - v8::HandleScope::HandleScope

BUG=359994
NOTRY=true

Review URL: https://codereview.chromium.org/250793003

git-svn-id: svn://svn.chromium.org/blink/trunk@172646 bbb929c8-8fbe-4397-9dbb-9b2b20218538