Devtools: Incorrect (random) order of "sections of dev tools" seen after clicking on ">>" sign

BUG=314054

Review URL: https://codereview.chromium.org/60003003

git-svn-id: svn://svn.chromium.org/blink/trunk@161351 bbb929c8-8fbe-4397-9dbb-9b2b20218538