Migrate simple ash Shell metrics users.

chrome/browser/chromeos/accessibility/accessibility_manager.cc

Index: chrome/browser/chromeos/accessibility/accessibility_manager.cc
diff --git a/chrome/browser/chromeos/accessibility/accessibility_manager.cc b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
index 2527f296eb3db683230a0f9d1f81ad1b807b5a83..33d4b01f7bb7b57bba1cb2c4f13d28e91b909ec6 100644
--- a/chrome/browser/chromeos/accessibility/accessibility_manager.cc
+++ b/chrome/browser/chromeos/accessibility/accessibility_manager.cc
@@ -13,8 +13,8 @@
 #include "ash/audio/sounds.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/common/session/session_state_delegate.h"
+#include "ash/common/wm_shell.h"
 #include "ash/high_contrast/high_contrast_controller.h"
-#include "ash/metrics/user_metrics_recorder.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ -588,7 +588,7 @@ void AccessibilityManager::EnableSpokenFeedback(
     ash::AccessibilityNotificationVisibility notify) {
   if (!profile_)
     return;
-  ash::Shell::GetInstance()->metrics()->RecordUserMetricsAction(
+  ash::WmShell::Get()->RecordUserMetricsAction(
       enabled ? ash::UMA_STATUS_AREA_ENABLE_SPOKEN_FEEDBACK
               : ash::UMA_STATUS_AREA_DISABLE_SPOKEN_FEEDBACK);