[ksmserver] Remove blocking call introspecting KDED

Summary:
We don't need to introspect at runtime as KDED installs the interface
XML file.

Oddly KDED's package is called KDED not KF5KDED, hence the separate
find_package, I don't know if that's a bug in frameworks or not.

Test Plan: Compiles

Reviewers: #plasma, romangg

Reviewed By: #plasma, romangg

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D16628

CMakeLists.txt

@@ -27,6 +27,8 @@ find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
                     Plasma DocTools Runner JsEmbed NotifyConfig Su NewStuff Wallet
                     IdleTime Declarative TextWidgets KDELibs4Support Crash GlobalAccel
                     DBusAddons Wayland CoreAddons)
+find_package(KDED CONFIG REQUIRED)
+
 find_package(KF5NetworkManagerQt ${KF5_MIN_VERSION})
 set_package_properties(KF5NetworkManagerQt PROPERTIES DESCRIPTION "Qt wrapper for NetworkManager API"
                        TYPE OPTIONAL

ksmserver/CMakeLists.txt

@@ -33,6 +33,7 @@ set(kcminit_xml ${CMAKE_CURRENT_BINARY_DIR}/org.kde.KCMinit.xml)
 
 qt5_generate_dbus_interface( ${kcminit_adaptor} ${kcminit_xml} )
 qt5_add_dbus_interface( ksmserver_KDEINIT_SRCS ${kcminit_xml} kcminit_interface )
+qt5_add_dbus_interface( ksmserver_KDEINIT_SRCS ${KDED_DBUS_INTERFACE} kded_interface )
 
 # FIXME: This is actually not disabled any more because OrgKDEKlauncherInterface isn't provided
 # otherwise.

ksmserver/startup.cpp

@@ -41,6 +41,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <ksmserver_debug.h>
 
 #include "kcminit_interface.h"
+#include "kded_interface.h"
 #include <klauncher_interface.h>
 
 #include <KCompositeJob>
@@ -254,10 +255,10 @@ KDEDInitJob::KDEDInitJob()
 
 void KDEDInitJob::start() {
     qCDebug(KSMSERVER());
-    QDBusInterface kded( QStringLiteral( "org.kde.kded5" ),
-                         QStringLiteral( "/kded" ),
-                         QStringLiteral( "org.kde.kded5" ) );
-    auto pending = kded.asyncCall( QStringLiteral( "loadSecondPhase" ) );
+    org::kde::kded5 kded( QStringLiteral("org.kde.kded5"),
+                         QStringLiteral("/kded"),
+                         QDBusConnection::sessionBus());
+    auto pending = kded.loadSecondPhase();
 
     QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pending, this);
     connect(watcher, &QDBusPendingCallWatcher::finished, this, [this]() {emitResult();});