Refactor YieldFor() to avoid code duplication among the ports.

Don't repeat the same code in all the ports, move it to the common base class
and add a new virtual DoYieldFor() for the really port-specific code.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76061 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/evtloopconsole.h

@@ -40,10 +40,12 @@ public:
     virtual bool Dispatch();
     virtual int DispatchTimeout(unsigned long timeout);
     virtual void WakeUp();
-    virtual bool YieldFor(long WXUNUSED(eventsToProcess)) { return true; }
 
     // Windows-specific function to process a single message
     virtual void ProcessMessage(WXMSG *msg);
+
+protected:
+    virtual void DoYieldFor(long eventsToProcess);
 };
 
 #endif // wxUSE_CONSOLE_EVENTLOOP