diff -r 000000000000 -r 6474c204b198 uriloader/exthandler/PExternalHelperApp.ipdl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uriloader/exthandler/PExternalHelperApp.ipdl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* 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 protocol PContent;
+include protocol PChannelDiverter;
+
+namespace mozilla {
+namespace dom {
+
+protocol PExternalHelperApp
+{
+  manager PContent;
+
+parent:
+  OnStartRequest(nsCString entityID);
+  OnDataAvailable(nsCString data, uint64_t offset, uint32_t count);
+  OnStopRequest(nsresult code);
+
+  DivertToParentUsing(PChannelDiverter diverter);
+
+child:
+  Cancel(nsresult aStatus);
+  __delete__();
+};
+
+
+} // namespace dom
+} // namespace mozilla