exo: Fix crash in SetCursor

components/exo/pointer.cc

Index: components/exo/pointer.cc
diff --git a/components/exo/pointer.cc b/components/exo/pointer.cc
index 5c22d537ed2c3e959a75370007894ee58d632b45..64d2ae41e57f7971cfb125de6e15f7a65e93dd75 100644
--- a/components/exo/pointer.cc
+++ b/components/exo/pointer.cc
@@ -72,6 +72,9 @@ void Pointer::SetCursor(Surface* surface, const gfx::Point& hotspot) {
   if (!focus_)
     return;
 
+  if (!widget_)
+    CreatePointerWidget();
+
   // If surface is different than the current pointer surface then remove the
   // current surface and add the new surface.
   if (surface != surface_) {