[Modern Media Controls] Only show controls when the controls attribute is set

[Modern Media Controls] Only show controls when the controls attribute is set
https://bugs.webkit.org/show_bug.cgi?id=165175

Source/WebCore:

We now respect the value of the media's "controls" attribute so that the start button and the controls
bar are only shown when that attribute is set to "true".

Patch by Antoine Quint <graouts@apple.com> on 2016-11-29
Reviewed by Dean Jackson.

Tests: media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off-audio.html
       media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off.html
       media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on-audio.html
       media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on.html
       media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-toggle.html

* Modules/modern-media-controls/controls/controls-bar.js: Added.
(ControlsBar):
* Modules/modern-media-controls/controls/media-controls.js:
(MediaControls.): Deleted.
* Modules/modern-media-controls/js-files:
* Modules/modern-media-controls/media/controls-visibility-support.js: Added.
(ControlsVisibilitySupport):
(ControlsVisibilitySupport.prototype.destroy):
(ControlsVisibilitySupport.prototype.get mediaEvents):
(ControlsVisibilitySupport.prototype.syncControl):
* Modules/modern-media-controls/media/media-controller-support.js:
(MediaControllerSupport):
(MediaControllerSupport.prototype.handleEvent):
* Modules/modern-media-controls/media/media-controller.js:
(MediaController.prototype._updateControlsIfNeeded):
* WebCore.xcodeproj/project.pbxproj:

LayoutTests:

We add new tests to check that the media's "control" attribute is respected. We also update a
series of tests to be more robust and turn the media "controls" attribute on so that the controls
bar is displayed as required by the tests.

Patch by Antoine Quint <graouts@apple.com> on 2016-11-29
Reviewed by Dean Jackson.

* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off-audio-expected.txt: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off-audio.html: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off-expected.txt: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-off.html: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on-audio-expected.txt: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on-audio.html: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on-expected.txt: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-on.html: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-toggle-expected.txt: Added.
* media/modern-media-controls/controls-visibility-support/controls-visibility-support-controls-toggle.html: Added.
* media/modern-media-controls/fullscreen-support/fullscreen-support-click.html:
* media/modern-media-controls/media-controls/media-controls-constructor-expected.txt:
* media/modern-media-controls/media-controls/media-controls-constructor.html:
* media/modern-media-controls/pip-support/pip-support-click.html:
* media/modern-media-controls/placard-support/placard-support-airplay.html:
* media/modern-media-controls/scrubber-support/scrubber-support-click-expected.txt:
* media/modern-media-controls/scrubber-support/scrubber-support-click.html:
* media/modern-media-controls/scrubber-support/scrubber-support-drag-expected.txt:
* media/modern-media-controls/scrubber-support/scrubber-support-drag.html:
* media/modern-media-controls/volume-support/volume-support-click.html:
* media/modern-media-controls/volume-support/volume-support-drag.html:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@209108 268f45cc-cd09-0410-ab3c-d52691b4dbfc