GitLab

This allows the graph view to poll for changes to node attached and node
related data for the nodes that are interesting at any time. This will
probably be done on hover and/or for nodes on explicit display.

Bug: 1068233
Change-Id: I52c6ba433784dbe8829beaa77d081f2a40d80010
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2152888Reviewed-by: Joe Mason <joenotcharles@chromium.org>
Reviewed-by: Will Harris <wfh@chromium.org>
Commit-Queue: Sigurður Ásgeirsson <siggi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760169}