Merge the latest version of Speedometer 2.0 to browserbench.org against at r221126.

Merge the latest version of Speedometer 2.0 to browserbench.org against at r221126.

Rubber-stamped by Yusuke Suzuki.

* Speedometer2.0: Replaced with PerformanceTests/Speedometer.
* Speedometer2.0/resources/todomvc/architecture-examples/preact/dist/app.js:
* Speedometer2.0/resources/todomvc/architecture-examples/preact/dist/todomvc.css:
* Speedometer2.0/resources/todomvc/architecture-examples/preact/src/app/footer.js:
* Speedometer2.0/resources/todomvc/architecture-examples/preact/src/app/index.js:
* Speedometer2.0/resources/todomvc/architecture-examples/preact/src/app/item.js:
* Speedometer2.0/resources/todomvc/architecture-examples/preact/src/app/util.js:
(export.uuid):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@221127 268f45cc-cd09-0410-ab3c-d52691b4dbfc