DevTools: rebaseline failing test heap-snapshot-with-detached-dom-tree.html

BUG=
TBR=yurys@chromium.org

Review URL: https://codereview.chromium.org/681793002

git-svn-id: svn://svn.chromium.org/blink/trunk@184458 bbb929c8-8fbe-4397-9dbb-9b2b20218538