Timeline: add layer tree outline to layer details view

This brings LayerTreeOutline to layers shown in Timeline details.

BUG=

Review URL: https://codereview.chromium.org/659403003

git-svn-id: svn://svn.chromium.org/blink/trunk@183991 bbb929c8-8fbe-4397-9dbb-9b2b20218538