Fix Profile* lifetime issues in Chrome's AppListViewDelegate

chrome/browser/ui/app_list/app_list_service_impl.h

Index: chrome/browser/ui/app_list/app_list_service_impl.h
diff --git a/chrome/browser/ui/app_list/app_list_service_impl.h b/chrome/browser/ui/app_list/app_list_service_impl.h
index 6fe68aec17630916bfde82251a5120c1da7f5b56..4102ee3edf2fcaae8c34e1b855c30a5d7b6c9e37 100644
--- a/chrome/browser/ui/app_list/app_list_service_impl.h
+++ b/chrome/browser/ui/app_list/app_list_service_impl.h
@@ -53,6 +53,10 @@ class AppListServiceImpl : public AppListService,
  protected:
   AppListServiceImpl();
 
+  // Destroy the app list. Called when the profile that the app list is showing
+  // is being deleted.
+  virtual void DestroyAppList() = 0;
+
   void InvalidatePendingProfileLoads();
   ProfileLoader& profile_loader() { return *profile_loader_; }
   const ProfileLoader& profile_loader() const { return *profile_loader_; }