Improve the appearance of DYEBench

Improve the appearance of DYEBench
https://bugs.webkit.org/show_bug.cgi?id=128866

Reviewed by Antti Koivisto.

Add a div that shows progress during the test. Also show 95th percentile,
and use a table instead of pre to show results.

* DoYouEvenBench/Full.html:
(.addResult): Added. Shows results in a table.
(benchmarkClient.willRunTest): Added to show the progress bar.
(benchmarkClient.didRunTest):
(benchmarkClient.didRunSuites):
(benchmarkClient.didFinishLastIteration): Compute 95th percentile using Statistics.js

* DoYouEvenBench/resources/benchmark-runner.js:
(BenchmarkRunner.prototype._appendFrame): Fix the bug where marginLeft and marginTop
weren't correctly parsed. We were treating top as left and bottom as top somehow.
(BenchmarkRunner.prototype._runTestAndRecordResults): Fixed a typo.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@164157 268f45cc-cd09-0410-ab3c-d52691b4dbfc