Remove manual declarations of qGlobalPostedEventsCount()

... in favor of including qabstracteventdispatcher_p.h, where needed.

Keeps the code DRY.

Change-Id: I5bee2e653cb29ffac2601ff03c952a4b3adbdb9c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qeventdispatcher_wasm.cpp

@@ -3,6 +3,7 @@
 
 #include "qeventdispatcher_wasm_p.h"
 
+#include <QtCore/private/qabstracteventdispatcher_p.h> // for qGlobalPostedEventsCount()
 #include <QtCore/qcoreapplication.h>
 #include <QtCore/qthread.h>
 #include <QtCore/qsocketnotifier.h>
@@ -14,7 +15,6 @@
 QT_BEGIN_NAMESPACE
 
 // using namespace emscripten;
-extern int qGlobalPostedEventsCount(); // from qapplication.cpp
 
 Q_LOGGING_CATEGORY(lcEventDispatcher, "qt.eventdispatcher");
 Q_LOGGING_CATEGORY(lcEventDispatcherTimers, "qt.eventdispatcher.timers");

src/corelib/kernel/qeventdispatcher_win.cpp

@@ -18,8 +18,6 @@
 
 QT_BEGIN_NAMESPACE
 
-extern uint qGlobalPostedEventsCount();
-
 #ifndef TIME_KILL_SYNCHRONOUS
 #  define TIME_KILL_SYNCHRONOUS 0x0100
 #endif

tests/auto/corelib/kernel/qcoreapplication/tst_qcoreapplication.cpp

@@ -7,6 +7,7 @@
 #include <QtCore/QtCore>
 #include <QTest>
 
+#include <private/qabstracteventdispatcher_p.h> // for qGlobalPostedEventsCount()
 #include <private/qcoreapplication_p.h>
 #include <private/qeventloop_p.h>
 #include <private/qthread_p.h>
@@ -513,10 +514,6 @@ void tst_QCoreApplication::applicationPid()
     QVERIFY(QCoreApplication::applicationPid() > 0);
 }
 
-QT_BEGIN_NAMESPACE
-Q_CORE_EXPORT uint qGlobalPostedEventsCount();
-QT_END_NAMESPACE
-
 class GlobalPostedEventsCountObject : public QObject
 {
     Q_OBJECT

tests/auto/corelib/thread/qthread/tst_qthread.cpp

@@ -1195,10 +1195,6 @@ void tst_QThread::isRunningInFinished()
     }
 }
 
-QT_BEGIN_NAMESPACE
-Q_CORE_EXPORT uint qGlobalPostedEventsCount();
-QT_END_NAMESPACE
-
 class DummyEventDispatcher : public QAbstractEventDispatcher {
 public:
     DummyEventDispatcher() : QAbstractEventDispatcher() {}