import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/base/nsICancelable.idl

@@ -0,0 +1,24 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+/**
+ * This interface provides a means to cancel an operation that is in progress.
+ */
+[scriptable, uuid(d94ac0a0-bb18-46b8-844e-84159064b0bd)]
+interface nsICancelable : nsISupports
+{
+  /**
+   * Call this method to request that this object abort whatever operation it
+   * may be performing.
+   *
+   * @param aReason
+   *        Pass a failure code to indicate the reason why this operation is
+   *        being canceled.  It is an error to pass a success code.
+   */
+  void cancel(in nsresult aReason);
+};