Fold fast/svg/script-tests/animation-events.js into the test using it

There's only one test using this "framework", so fold it into the test
itself. Move the result to svg/animation/.

Straight copy of the .js file into the .html file. Whitespace is adjusted
and some redundant things are removed (';' and <div>.)

BUG=625231

Review-Url: https://codereview.chromium.org/2112373002
Cr-Commit-Position: refs/heads/master@{#403510}
2 files changed