[GLIB] Fix invalid D-Bus name for MPRIS
https://bugs.webkit.org/show_bug.cgi?id=241807

Reviewed by Philippe Normand.

A mistake introduced in #1651 used a bus name where a segment started with
a number which is not allowed. Change this to `.instance-$INSTANCE_ID` to fix that.

* Source/WebCore/platform/audio/glib/MediaSessionGLib.cpp:
(WebCore::MediaSessionGLib::MediaSessionGLib):

Canonical link: https://commits.webkit.org/251744@main


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@295739 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/WebCore/platform/audio/glib/MediaSessionGLib.cpp b/Source/WebCore/platform/audio/glib/MediaSessionGLib.cpp
index 37d657f..720ddfa 100644
--- a/Source/WebCore/platform/audio/glib/MediaSessionGLib.cpp
+++ b/Source/WebCore/platform/audio/glib/MediaSessionGLib.cpp
@@ -222,7 +222,7 @@
     }
 
     const auto& applicationID = getApplicationID();
-    m_instanceId = applicationID.isEmpty() ? makeString("org.mpris.MediaPlayer2.webkit.instance", getpid(), "-", identifier.toUInt64()) : makeString("org.mpris.MediaPlayer2.", applicationID.ascii().data(), ".", identifier.toUInt64());
+    m_instanceId = applicationID.isEmpty() ? makeString("org.mpris.MediaPlayer2.webkit.instance", getpid(), "-", identifier.toUInt64()) : makeString("org.mpris.MediaPlayer2.", applicationID.ascii().data(), ".instance-", identifier.toUInt64());
 
     m_ownerId = g_bus_own_name_on_connection(m_connection.get(), m_instanceId.ascii().data(), G_BUS_NAME_OWNER_FLAGS_NONE, nullptr, nullptr, this, nullptr);
 }