Remove NOTIFICATION_BROWSING_DATA_REMOVED

chrome/browser/browsing_data/browsing_data_remover.h

Index: chrome/browser/browsing_data/browsing_data_remover.h
diff --git a/chrome/browser/browsing_data/browsing_data_remover.h b/chrome/browser/browsing_data/browsing_data_remover.h
index 133a89a72e13a80558a934465a650c1e7a99ed62..174458d756bc0d1a3fcc68aa8a91449d49e5d127 100644
--- a/chrome/browser/browsing_data/browsing_data_remover.h
+++ b/chrome/browser/browsing_data/browsing_data_remover.h
@@ -152,6 +152,10 @@ class BrowsingDataRemover
     virtual ~Observer() {}
   };
 
+  using Callback = base::Callback<void(const NotificationDetails&)>;
+  using CallbackSubscription = scoped_ptr<
+      base::CallbackList<void(const NotificationDetails&)>::Subscription>;
+
   // The completion inhibitor can artificially delay completion of the browsing
   // data removal process. It is used during testing to simulate scenarios in
   // which the deletion stalls or takes a very long time.
@@ -200,6 +204,12 @@ class BrowsingDataRemover
     completion_inhibitor_ = inhibitor;
   }
 
+  // Add a callback to the list of callbacks to be called during a browsing data
+  // removal event. Returns a subscription object that can be used to
+  // un-register the callback.
+  static CallbackSubscription RegisterOnBrowsingDataRemovedCallback(
+      const Callback& callback);
+
   // Removes the specified items related to browsing for all origins that match
   // the provided |origin_set_mask| (see BrowsingDataHelper::OriginSetMask).
   void Remove(int remove_mask, int origin_set_mask);