ash: Use SessionController instead of SessionStateDelegate

ash/common/wm/workspace/workspace_layout_manager.cc

Index: ash/common/wm/workspace/workspace_layout_manager.cc
diff --git a/ash/common/wm/workspace/workspace_layout_manager.cc b/ash/common/wm/workspace/workspace_layout_manager.cc
index ddef2f202e6be06448958c6efddb6dbe1b56e6e2..8ff93626eeff58878745496ea231b1daa6f6c212 100644
--- a/ash/common/wm/workspace/workspace_layout_manager.cc
+++ b/ash/common/wm/workspace/workspace_layout_manager.cc
@@ -7,7 +7,7 @@
 #include <algorithm>
 
 #include "ash/common/keyboard/keyboard_observer_register.h"
-#include "ash/common/session/session_state_delegate.h"
+#include "ash/common/session/session_controller.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/wm/always_on_top_controller.h"
 #include "ash/common/wm/fullscreen_window_finder.h"
@@ -352,7 +352,7 @@ void WorkspaceLayoutManager::AdjustAllWindowsBoundsForWorkAreaChange(
   // This would happen if the launcher was auto hidden before the login screen
   // was shown and then gets shown when the login screen gets presented.
   if (event->type() == wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED &&
-      shell_->GetSessionStateDelegate()->IsScreenLocked())
+      WmShell::Get()->session_controller()->IsScreenLocked())
     return;
 
   // If a user plugs an external display into a laptop running Aura the