Drop delegating Workspace::slotToggleCompositing

Instead connect global shortcut directly to method in Compositor.

kwinbindings.cpp

@@ -159,7 +159,7 @@ DEF(I18N_NOOP("Switch to Next Screen"),            0, slotSwitchToNextScreen);
 DEF(I18N_NOOP("Switch to Previous Screen"),        0, slotSwitchToPrevScreen);
 
 DEF(I18N_NOOP("Kill Window"),                      Qt::CTRL + Qt::ALT + Qt::Key_Escape, slotKillWindow);
-DEF(I18N_NOOP("Suspend Compositing"),              Qt::SHIFT + Qt::ALT + Qt::Key_F12, slotToggleCompositing);
+DEF6(I18N_NOOP("Suspend Compositing"),             Qt::SHIFT + Qt::ALT + Qt::Key_F12, Compositor::self(), Compositor::slotToggleCompositing);
 DEF6(I18N_NOOP("Invert Screen Colors"),            0, kwinApp()->platform(), Platform::invertScreen);
 
 #undef DEF

useractions.cpp

@@ -34,6 +34,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "useractions.h"
 #include "cursor.h"
 #include "client.h"
+#include "composite.h"
 #include "input.h"
 #include "workspace.h"
 #include "effects.h"

workspace.cpp

@@ -1654,13 +1654,6 @@ QString Workspace::supportInformation() const
     return support;
 }
 
-void Workspace::slotToggleCompositing()
-{
-    if (m_compositor) {
-        m_compositor->slotToggleCompositing();
-    }
-}
-
 Client *Workspace::findClient(std::function<bool (const Client*)> func) const
 {
     if (Client *ret = Toplevel::findInList(clients, func)) {

workspace.h

@@ -443,7 +443,6 @@ public Q_SLOTS:
 
     void slotSetupWindowShortcut();
     void setupWindowShortcutDone(bool);
-    void slotToggleCompositing();
 
     void updateClientArea();