create the screen manager service when asked.

gfx/src/gtk/nsGfxFactoryGTK.cpp

@@ -35,6 +35,7 @@
 #include "nsDeviceContextSpecFactoryG.h" 
 #include "nsIDeviceContextSpecPS.h"
 #include "nsIImageManager.h"
+#include "nsScreenManagerGtk.h"
 #include <gtk/gtk.h>
 
 static NS_DEFINE_IID(kCFontMetrics, NS_FONT_METRICS_CID);
@@ -53,6 +54,7 @@ static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
 static NS_DEFINE_IID(kCDeviceContextSpec, NS_DEVICE_CONTEXT_SPEC_CID);
 static NS_DEFINE_IID(kCDeviceContextSpecFactory, NS_DEVICE_CONTEXT_SPEC_FACTORY_CID); 
 static NS_DEFINE_IID(kImageManagerImpl, NS_IMAGEMANAGER_CID);
+static NS_DEFINE_IID(kCScreenManager, NS_SCREENMANAGER_CID);
 
 
 
@@ -174,6 +176,9 @@ nsresult nsGfxFactoryGTK::CreateInstance(nsISupports *aOuter,
     NS_NEWXPCOM(fe, nsFontEnumeratorGTK);
     inst = (nsISupports *)fe;
   } 
+	else if (mClassID.Equals(kCScreenManager)) {
+		NS_NEWXPCOM(inst, nsScreenManagerGtk);
+  } 
 	
   if (inst == NULL) {  
     return NS_ERROR_OUT_OF_MEMORY;  

gfx/src/mac/nsGfxFactoryMac.cpp

@@ -33,6 +33,7 @@
 #include "nsIImageManager.h"
 #include "nsDeviceContextSpecMac.h"
 #include "nsDeviceContextSpecFactoryM.h"
+#include "nsScreenManagerMac.h"
 #include "nsBlender.h"
 #include "nsCOMPtr.h"
 
@@ -47,6 +48,7 @@ static NS_DEFINE_IID(kCDeviceContextSpec, NS_DEVICE_CONTEXT_SPEC_CID);
 static NS_DEFINE_IID(kCDeviceContextSpecFactory, NS_DEVICE_CONTEXT_SPEC_FACTORY_CID);
 static NS_DEFINE_IID(kImageManagerImpl, NS_IMAGEMANAGER_CID);
 static NS_DEFINE_IID(kCBlender, NS_BLENDER_CID);
+static NS_DEFINE_IID(kCScreenManager, NS_SCREENMANAGER_CID);
 
 static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
 static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
@@ -138,6 +140,9 @@ nsresult nsGfxFactoryMac::CreateInstance(nsISupports *aOuter,
     NS_NEWXPCOM(fe, nsFontEnumeratorMac);
     inst = (nsISupports *)fe;
   } 
+	else if (mClassID.Equals(kCScreenManager)) {
+		NS_NEWXPCOM(inst, nsScreenManagerMac);
+  } 
 
 
 	if (inst == NULL) {  

gfx/src/windows/nsGfxFactoryWin.cpp

@@ -34,6 +34,7 @@
 #include "nsDeviceContextSpecFactoryW.h"
 #include "nsScriptableRegion.h"
 #include "nsIImageManager.h"
+#include "nsScreenManagerWin.h"
 
 static NS_DEFINE_IID(kCFontMetrics, NS_FONT_METRICS_CID);
 static NS_DEFINE_IID(kCFontEnumerator, NS_FONT_ENUMERATOR_CID);
@@ -46,6 +47,7 @@ static NS_DEFINE_IID(kCDeviceContextSpec, NS_DEVICE_CONTEXT_SPEC_CID);
 static NS_DEFINE_IID(kCDeviceContextSpecFactory, NS_DEVICE_CONTEXT_SPEC_FACTORY_CID);
 static NS_DEFINE_IID(kCDrawingSurface, NS_DRAWING_SURFACE_CID);
 static NS_DEFINE_IID(kImageManagerImpl, NS_IMAGEMANAGER_CID);
+static NS_DEFINE_IID(kCScreenManager, NS_SCREENMANAGER_CID);
 
 static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
 static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
@@ -208,6 +210,9 @@ nsresult nsGfxFactoryWin::CreateInstance(nsISupports *aOuter,
     NS_NEWXPCOM(fe, nsFontEnumeratorWin);
     inst = (nsISupports *)fe;
   } 
+	else if (mClassID.Equals(kCScreenManager)) {
+		NS_NEWXPCOM(inst, nsScreenManagerWin);
+  } 
 
 
   if (inst == NULL) {