Draw directly onto windows, not on a pixmap

gfx/src/gtk/nsRenderingContextGTK.cpp

@@ -467,14 +467,9 @@ NS_IMETHODIMP nsRenderingContextGTK::CreateDrawingSurface(nsRect *aBounds,
     return NS_ERROR_FAILURE;
   }
 
-  GdkPixmap *pixmap = ::gdk_pixmap_new(mRenderingSurface->drawable, 
-                                       aBounds->width,
-                                       aBounds->height, 
-                                       -1);
-
   nsDrawingSurfaceGTK * surface = new nsDrawingSurfaceGTK();
 
-  surface->drawable = pixmap ;
+  surface->drawable = mRenderingSurface->drawable;
   surface->gc       = mRenderingSurface->gc;
 
   aSurface = (nsDrawingSurface)surface;