Fix shelf alignment and auto-hide initialization.

ash/shelf/shelf_widget_unittest.cc

Index: ash/shelf/shelf_widget_unittest.cc
diff --git a/ash/shelf/shelf_widget_unittest.cc b/ash/shelf/shelf_widget_unittest.cc
index a2330e3c27ba428a66c111bb5ccbd146b1c5556c..42c07ac666b40cebae102bb60e2b5f52cda83400 100644
--- a/ash/shelf/shelf_widget_unittest.cc
+++ b/ash/shelf/shelf_widget_unittest.cc
@@ -354,6 +354,7 @@ class ShelfInitializer : public ShellObserver {
     WmShelf* shelf = root_window->GetRootWindowController()->GetShelf();
     shelf->SetAlignment(alignment_);
     shelf->SetAutoHideBehavior(auto_hide_);
+    shelf->UpdateVisibilityState();
   }
 
  private: