IndexedDB: Ignore open/delete requests from terminated renderers.

content/browser/indexed_db/mock_indexed_db_callbacks.cc

Index: content/browser/indexed_db/mock_indexed_db_callbacks.cc
diff --git a/content/browser/indexed_db/mock_indexed_db_callbacks.cc b/content/browser/indexed_db/mock_indexed_db_callbacks.cc
index 0d5c2bd01a35f1e1ee332346b0d8ead882566485..1bb39c6bb02ba17975fd31f0e79076ff918b6917 100644
--- a/content/browser/indexed_db/mock_indexed_db_callbacks.cc
+++ b/content/browser/indexed_db/mock_indexed_db_callbacks.cc
@@ -33,4 +33,8 @@ void MockIndexedDBCallbacks::OnSuccess(
   connection_ = std::move(connection);
 }
 
+bool MockIndexedDBCallbacks::IsValid() const {
+  return true;
+}
+
 }  // namespace content