runner.js in performance tests should define a class

runner.js in performance tests should define a class
https://bugs.webkit.org/show_bug.cgi?id=77074

Reviewed by Eric Seidel.

Wrap all functions in runner.js by PerfTestRunner and update tests that runner.js accordingly.
Also replace compute* functions in runner.js by more robust code from dom-perf.js.

* Bindings/event-target-wrapper.html:
* DOM/DOMTable.html:
* DOM/resources/dom-perf.js:
(BenchmarkSuite.prototype.RunSingle):
(runBenchmarkSuite):
* Mutation/append-child-deep.html:
* Mutation/append-child.html:
* Mutation/inner-html.html:
* Mutation/remove-child-deep.html:
* Mutation/remove-child.html:
* Parser/html-parser.html:
* Parser/html5-full-render.html:
* Parser/simple-url.html:
* Parser/tiny-innerHTML.html:
* Parser/url-parser.html:
* Parser/xml-parser.html:
* resources/runner.js:
(PerfTestRunner.log):
(PerfTestRunner.logInfo):
(PerfTestRunner.loadFile):
(PerfTestRunner.computeStatistics):
(PerfTestRunner.logStatistics):
(PerfTestRunner._runLoop.else):
(PerfTestRunner._runLoop):
(PerfTestRunner._runner):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106379 268f45cc-cd09-0410-ab3c-d52691b4dbfc