Remove NOTIFICATION_HISTORY_URLS_DELETED

chrome/browser/autocomplete/shortcuts_backend.h

Index: chrome/browser/autocomplete/shortcuts_backend.h
diff --git a/chrome/browser/autocomplete/shortcuts_backend.h b/chrome/browser/autocomplete/shortcuts_backend.h
index 88d82ddbd92243edf0b0bc1f565ae9e5711c23fa..96d2f7941b7c0709e11ebc49cb1c3ce836eb6ba0 100644
--- a/chrome/browser/autocomplete/shortcuts_backend.h
+++ b/chrome/browser/autocomplete/shortcuts_backend.h
@@ -14,10 +14,12 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
+#include "base/scoped_observer.h"
 #include "base/strings/string16.h"
 #include "base/synchronization/lock.h"
 #include "base/time/time.h"
 #include "chrome/browser/history/shortcuts_database.h"
+#include "components/history/core/browser/history_service_observer.h"
 #include "components/keyed_service/core/refcounted_keyed_service.h"
 #include "components/omnibox/autocomplete_match.h"
 #include "content/public/browser/notification_observer.h"
@@ -33,7 +35,8 @@ class ShortcutsDatabase;
 // This class manages the shortcut provider backend - access to database on the
 // db thread, etc.
 class ShortcutsBackend : public RefcountedKeyedService,
-                         public content::NotificationObserver {
+                         public content::NotificationObserver,
+                         public history::HistoryServiceObserver {
  public:
   typedef std::multimap<base::string16,
                         const history::ShortcutsDatabase::Shortcut> ShortcutMap;
@@ -128,6 +131,11 @@ class ShortcutsBackend : public RefcountedKeyedService,
   // Deletes all of the shortcuts.
   bool DeleteAllShortcuts();
 
+  // history::HistoryServiceObserver:
+  void OnURLsDeleted(
+      HistoryService* history_service,
+      const history::URLsDeletedDetails& deleted_details) override;
+
   Profile* profile_;
   CurrentState current_state_;
   ObserverList<ShortcutsBackendObserver> observer_list_;
@@ -148,6 +156,9 @@ class ShortcutsBackend : public RefcountedKeyedService,
   // For some unit-test only.
   bool no_db_access_;
 
+  ScopedObserver<HistoryService, HistoryServiceObserver>
+      history_service_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(ShortcutsBackend);
 };