It's currently enabled, because it uses the default value for all other runtime features, but modern media controls are not a cross-platform feature. I think this is why media/video-click-dblckick-standalone.html started to fail after r214426. I can't reproduce the failure locally, though.
Created attachment 305967 [details] Patch
Comment on attachment 305967 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=305967&action=review This needs a build flag too. Having only a runtime flag really only makes sense if the feature could plausibly work on all platforms. This one is Mac-only. And please name it with _ENABLED. > Source/WebKit2/Shared/WebPreferencesDefinitions.h:320 > +#define DEFAULT_MODERN_MEDIA_CONTROLS true DEFAULT_MODERN_MEDIA_CONTROLS_ENABLED > Source/WebKit2/Shared/WebPreferencesDefinitions.h:322 > +#define DEFAULT_MODERN_MEDIA_CONTROLS false DEFAULT_MODERN_MEDIA_CONTROLS_ENABLED
(In reply to Michael Catanzaro from comment #2) > Comment on attachment 305967 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=305967&action=review > > This needs a build flag too. Having only a runtime flag really only makes > sense if the feature could plausibly work on all platforms. This one is > Mac-only. > > And please name it with _ENABLED. Indeed. That was my intention, but somehow I didn't add that in the end. > > Source/WebKit2/Shared/WebPreferencesDefinitions.h:320 > > +#define DEFAULT_MODERN_MEDIA_CONTROLS true > > DEFAULT_MODERN_MEDIA_CONTROLS_ENABLED > > > Source/WebKit2/Shared/WebPreferencesDefinitions.h:322 > > +#define DEFAULT_MODERN_MEDIA_CONTROLS false > > DEFAULT_MODERN_MEDIA_CONTROLS_ENABLED
Committed r214666: <http://trac.webkit.org/changeset/214666>