Updated definitions for timeline record descriptions

[jaredwilli]

[paulirish]

Jared, we'll also be putting these descriptions right into devtools timeline as well.

https://code.google.com/p/chromium/issues/detail?id=424930#c6

kinda like this

[jaredwilli]

Oh nice!!

[paulirish]

hey jared

here's what's currently implemented: https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/devtools/front_end/timeline/TimelineUIUtilsImpl.js&q=%22Update%20Layer%20Tree%22&sq=package:chromium&type=cs&l=199

here's what currently documented: https://developer.chrome.com/devtools/docs/timeline#timeline-event-reference

let's pull the doc side out into a new doc and stub out sections for whatever is missing. Then let's augment our descriptions for these records so far. they are pretty sparse.

How about by monday?

[jaredwilli]

I was sick all last week, so didn't get to this yet.

[jaredwilli]

Doc is started here: https://docs.google.com/document/d/14_h9zUvnSAj5lSbCTFVXZlbbpUOau9EmLPkTZcK92UM/edit#