Don't use raw protocol data in inspector/timeline/timeline-node-reference.html

BUG=398785
R=loislo@chromium.org

Review URL: https://codereview.chromium.org/483523003

git-svn-id: svn://svn.chromium.org/blink/trunk@180533 bbb929c8-8fbe-4397-9dbb-9b2b20218538