Keep a global reference to the Image Manager to prevent it from being deleted.

gfx/src/nsImageGroup.cpp

@@ -77,6 +77,7 @@ private:
 ImageGroupImpl::ImageGroupImpl(nsIImageManager *aManager)
 {
   NS_INIT_REFCNT();
+  // XXX: The caller has already called AddRef() on aManager...
   mManager = aManager;
 }
  

gfx/src/nsImageManager.cpp

@@ -125,6 +125,8 @@ NS_NewImageManager(nsIImageManager **aInstancePtrResult)
 
   if (ImageManagerImpl::sTheImageManager == nsnull) {
     ImageManagerImpl::sTheImageManager = new ImageManagerImpl();
+    // XXX: This will prevent the ImageManager from being deleted :-(
+    NS_IF_ADDREF(ImageManagerImpl::sTheImageManager);
   }
 
   if (ImageManagerImpl::sTheImageManager == nsnull) {