The Metrics content is small enough that it doesn't need its own panel. I think that it would fit better in the Computed panel.
Created attachment 258345 [details] Patch
Comment on attachment 258345 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=258345&action=review > Source/WebInspectorUI/ChangeLog:37 > + Give the metrics section in the Computed panel a white background. I'm not sure about this. Screenshot?
Created attachment 258346 [details] Metrics section with white background
Comment on attachment 258345 [details] Patch Clearing flags on attachment: 258345 Committed r188029: <http://trac.webkit.org/changeset/188029>
All reviewed patches have been landed. Closing bug.