/* static */ TabGroup*
TabGroup::GetFromActor(TabChild* aTabChild)
{
MOZ_RELEASE_ASSERT(NS_IsMainThread());
// Middleman processes do not assign event targets to their tab children.
if (recordreplay::IsMiddleman()) {
return GetChromeTabGroup();
}
nsCOMPtr<nsIEventTarget> target = aTabChild->Manager()->GetEventTargetFor(aTabChild);
if (!target) {
return nullptr;
}
// We have an event target. We assume the IPC code created it via
// TabGroup::CreateEventTarget.
RefPtr<SchedulerGroup> group =
SchedulerGroup::FromEventTarget(target);
MOZ_RELEASE_ASSERT(group);
auto tabGroup = group->AsTabGroup();
MOZ_RELEASE_ASSERT(tabGroup);
// We delay creating the event targets until now since the TabGroup
// constructor ran off the main thread.
tabGroup->EnsureThrottledEventQueues();
return tabGroup;
}
