Make AppListServiceAsh::OnProfileWillBeRemoved do nothing.

chrome/browser/ui/ash/app_list/app_list_service_ash.h

Index: chrome/browser/ui/ash/app_list/app_list_service_ash.h
diff --git a/chrome/browser/ui/ash/app_list/app_list_service_ash.h b/chrome/browser/ui/ash/app_list/app_list_service_ash.h
index a8c42e9c9e6b45a1e698a7f158cc06ec8cbf31e8..6dcc302ca106a735869ebd314528e09f6124b984 100644
--- a/chrome/browser/ui/ash/app_list/app_list_service_ash.h
+++ b/chrome/browser/ui/ash/app_list/app_list_service_ash.h
@@ -21,6 +21,12 @@ class AppListServiceAsh : public AppListServiceImpl {
   // AppListService overrides:
   void Init(Profile* initial_profile) override;
 
+  // ProfileInfoCacheObserver overrides:
+  // On ChromeOS this should never happen. On other platforms, there is always a
+  // Non-ash AppListService that is responsible for handling this.
+  // TODO(calamity): Ash shouldn't observe the ProfileInfoCache at all.
+  void OnProfileWillBeRemoved(const base::FilePath& profile_path) override;
+
  private:
   friend struct DefaultSingletonTraits<AppListServiceAsh>;