Return number of values deleted by IDBObjectStore.delete(range)

content/browser/indexed_db/indexed_db_database.cc

Index: content/browser/indexed_db/indexed_db_database.cc
diff --git a/content/browser/indexed_db/indexed_db_database.cc b/content/browser/indexed_db/indexed_db_database.cc
index c686ae87ad3aaa4a86d13e948f644c1f0c8265ba..11054433af2c55b1c352ba1e44df5c3440017823 100644
--- a/content/browser/indexed_db/indexed_db_database.cc
+++ b/content/browser/indexed_db/indexed_db_database.cc
@@ -17,6 +17,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/memory/scoped_vector.h"
 #include "base/metrics/histogram_macros.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ -1410,13 +1411,12 @@ void IndexedDBDatabase::DeleteRangeOperation(
     std::unique_ptr<IndexedDBKeyRange> key_range,
     scoped_refptr<IndexedDBCallbacks> callbacks,
     IndexedDBTransaction* transaction) {
-  IDB_TRACE1(
-      "IndexedDBDatabase::DeleteRangeOperation", "txn.id", transaction->id());
+  IDB_TRACE1("IndexedDBDatabase::DeleteRangeOperation", "txn.id",
+             transaction->id());
+  size_t delete_count = 0;
   leveldb::Status s =
-      backing_store_->DeleteRange(transaction->BackingStoreTransaction(),
-                                  id(),
-                                  object_store_id,
-                                  *key_range);
+      backing_store_->DeleteRange(transaction->BackingStoreTransaction(), id(),
+                                  object_store_id, *key_range, &delete_count);
   if (!s.ok()) {
     base::string16 error_string =
         ASCIIToUTF16("Internal error deleting data in range");
@@ -1428,7 +1428,7 @@ void IndexedDBDatabase::DeleteRangeOperation(
     }
     return;
   }
-  callbacks->OnSuccess();
+  callbacks->OnSuccess(base::checked_cast<int64_t>(delete_count));
 }
 
 void IndexedDBDatabase::Clear(int64_t transaction_id,