Shutdown the status tray before the system tray delegate.

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index 69777902b3b07bc370895d0dcaaa824fbc0c0683..3ce40a4ad0953c427e3fb54e546a21a0d63f54bd 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -664,8 +664,13 @@ void RootWindowController::DeactivateKeyboard(
     parent->RemoveChild(keyboard_container);
     // Virtual keyboard may be deactivated while still showing, notify all
     // observers that keyboard bounds changed to 0 before remove them.
-    keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
+
+    // Shelf has already been shut down. Don't send a keyboard bounds changing
+    // notification to it.

[stevenjb, 2016/01/25 23:28:17]

This is problematic. Since (presumably) shelf()->shelf_layout_manager() is still
valid here, it needs to know to ignore this notification when it is shut down.
Artificially inverting this ordering is very confusing.

[jdufault, 2016/01/26 00:55:05]

Reverted this change, the keyboard is now deinited before the shelf.

     keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
+
+    keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
+
     keyboard_controller->RemoveObserver(panel_layout_manager_);
     keyboard_controller->RemoveObserver(docked_layout_manager_);
     keyboard_controller->RemoveObserver(