Fix compilation with namespaced Qt.

src/plugins/debugger/debuggermainwindow.h

@@ -4,8 +4,7 @@
 #include "debuggeruiswitcher.h"
 #include <utils/fancymainwindow.h>
 
-
-class QMenu;
+QT_FORWARD_DECLARE_CLASS(QMenu);
 
 namespace Debugger {
 

src/plugins/debugger/debuggeruiswitcher.h

@@ -13,10 +13,10 @@ namespace Core {
     class Command;
 }
 
-class QAction;
-class QDockWidget;
-class QStackedWidget;
-class QComboBox;
+QT_FORWARD_DECLARE_CLASS(Action);
+QT_FORWARD_DECLARE_CLASS(QDockWidget);
+QT_FORWARD_DECLARE_CLASS(QStackedWidget);
+QT_FORWARD_DECLARE_CLASS(QComboBox);
 
 namespace Debugger {
     class DebuggerMainWindow;

src/plugins/qmldesigner/components/itemlibrary/itemlibrarymodel.h

@@ -7,7 +7,7 @@
 #include <QScriptEngine>
 #include <private/qmllistmodel_p.h>
 
-class QMimeData;
+QT_FORWARD_DECLARE_CLASS(QMimeData);
 
 namespace QmlDesigner {
 

src/plugins/qmldesigner/components/itemlibrary/itemlibrarytreeview.h

@@ -36,7 +36,7 @@
 #include <QDebug>
 #include <QTimeLine>
 
-class QLabel;
+QT_FORWARD_DECLARE_CLASS(QLabel);
 
 namespace QmlDesigner {
 

src/plugins/qmlinspector/inspectoroutputpane.h

@@ -33,8 +33,8 @@
 
 #include <QtCore/QObject>
 
-class QTextEdit;
-class RunControl;
+QT_FORWARD_DECLARE_CLASS(QTextEdit);
+QT_FORWARD_DECLARE_CLASS(RunControl);
 
 namespace Qml {
 

src/plugins/qmlinspector/qmlinspector.h

@@ -55,6 +55,7 @@ class ObjectPropertiesView;
 class CanvasFrameRate;
 class ExpressionQueryWidget;
 
+QT_END_NAMESPACE
 
 namespace Qml {
     class EngineSpinBox;
@@ -112,6 +113,4 @@ private:
 
 }
 
-QT_END_NAMESPACE
-
 #endif

src/plugins/qmlinspector/qmlinspectorplugin.h

@@ -35,18 +35,16 @@
 #include <QtCore/QPointer>
 #include <QtCore/QTimer>
 
-QT_BEGIN_NAMESPACE
-
-class QStringList;
-
-namespace ProjectExplorer {
-    class Project;
-}
+QT_FORWARD_DECLARE_CLASS(QStringList);
 
 namespace Core {
     class IMode;
 }
 
+namespace ProjectExplorer {
+    class Project;
+}
+
 namespace Qml {
     class QmlInspector;
     class InspectorOutputPane;
@@ -83,6 +81,4 @@ private:
 
 }
 
-QT_END_NAMESPACE
-
 #endif // QMLINSPECTORPLUGIN_H