google/tracing-framework — pull request #164 by benvanik (2012-12-22 13:08:13+00:00)
Title: Adding app extensions/panels and a test one that draws a sankey diagram.

App extensions are now loaded (in their own hidden iframes) and can create
panels via an API that also get their own iframes.
Need to add a way to add/toggle extensions.

The test extension draws a sankey diagram with d3, which is kind of cool.