Bump the priority of iOS ProcessAssertion Queue

https://bugs.webkit.org/show_bug.cgi?id=240784

Patch by Youenn Fablet <youennf@gmail.com> on 2022-05-23
Reviewed by Chris Dumez.

It is important to acquire assertions in a timely manner as otherwise the UIProcess
might think a process is unresponsive.
Bump the priority to WorkQueue::QOS::UserInitiated.

* Source/WebKit/UIProcess/ios/ProcessAssertionIOS.mm:
(assertionsWorkQueue):

Canonical link: https://commits.webkit.org/250874@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294650 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/UIProcess/ios/ProcessAssertionIOS.mm

@@ -44,7 +44,7 @@
 
 static WorkQueue& assertionsWorkQueue()
 {
-    static NeverDestroyed<Ref<WorkQueue>> workQueue(WorkQueue::create("ProcessAssertion Queue"));
+    static NeverDestroyed<Ref<WorkQueue>> workQueue(WorkQueue::create("ProcessAssertion Queue", WorkQueue::QOS::UserInitiated));
     return workQueue.get();
 }