[iOS] Update AirPlay route monitoring

[Eric Carlson]

Update the API used to monitor AirPlay routes.

[Eric Carlson]

<rdar://problem/40230677>

[Eric Carlson]

Created attachment 340591 [details]
Patch

[Jer Noble]

Comment on attachment 340591 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=340591&action=review

> Source/WebCore/platform/audio/ios/MediaSessionManagerIOS.mm:463
> +        if (!protectedSelf->_callback)
>              return;
>  
> -        _callback->applicationWillEnterForeground(isSuspendedUnderLock);
> +        protectedSelf->_callback->applicationWillEnterForeground(isSuspendedUnderLock);

Nit: this and the next 4 instances of this pattern could have a reversed if case:

if (auto* callback = protectedSelf->callback)
    callback->applicationWillEnterForeground(isSuspendedUnderLock);

[Eric Carlson]

Created attachment 340610 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 340610 [details]
Patch for landing

Clearing flags on attachment: 340610

Committed r231913: <https://trac.webkit.org/changeset/231913>

[Eric Carlson]

Created attachment 340638 [details]
Build fix.

[WebKit Commit Bot]

Comment on attachment 340638 [details]
Build fix.

Clearing flags on attachment: 340638

Committed r231921: <https://trac.webkit.org/changeset/231921>