Use the media queries to dynamically set the stage for the graphics benchmark

Use the media queries to dynamically set the stage for the graphics benchmark
https://bugs.webkit.org/show_bug.cgi?id=151327

Patch by Said Abou-Hallawa <sabouhallawa@apple.com> on 2015-11-17
Reviewed by Simon Fraser.

Clean setting the benchmark css rules by using the media queries. Accessing
document.stylesheets.cssRules seems to be unreliable. Fix the test harness
load event listener invocation. And also remove the options for normalizing
the stage resolution for retina display.

* Animometer/resources/extensions.js:
(window.DocumentExtension.insertCssRuleAfter): Deleted.
* Animometer/runner/animometer.html:
* Animometer/runner/resources/animometer.css:
(@media screen and (min-device-width: 1800px)):
* Animometer/runner/resources/animometer.js:
(window.sectionsManager.setupRunningSectionStyle):
(window.benchmarkController.initialize):
(window.sectionsManager.setupSectionStyle): Deleted.
* Animometer/tests/bouncing-particles/resources/bouncing-particles.js:
(BouncingParticlesStage):
* Animometer/tests/text/layering-text.html:
* Animometer/tests/text/resources/layering-text.js:
(LayeringTextStage):
(LayeringTextStage.prototype._setFontSize): Deleted.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@192549 268f45cc-cd09-0410-ab3c-d52691b4dbfc