Correctly update the popup window position

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index c2d515bac08495469464843f782b0114f15c29f4..db48036f84dc875517ff0b947db2daa4eb65fb7f 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -313,8 +313,11 @@ void Window::SetBoundsInScreen(const gfx::Rect& new_bounds_in_screen,
   if (root) {
     aura::client::ScreenPositionClient* screen_position_client =
         aura::client::GetScreenPositionClient(root);
-    screen_position_client->SetBounds(this, new_bounds_in_screen, dst_display);
-    return;
+    if (screen_position_client) {
+      screen_position_client->SetBounds(this, new_bounds_in_screen,
+                                        dst_display);
+      return;
+    }
   }
   SetBounds(new_bounds_in_screen);
 }