GitLab

This introduces a describer that allows annotating FrameNodes with their
full internal state in the chrome://discards/graph view.

BUG=1077305

Change-Id: Ibad88a2a4c4961a445c02e96c8c186f63831fd81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2176285
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Reviewed-by: dpapad <dpapad@chromium.org>
Reviewed-by: Joe Mason <joenotcharles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#765413}