diff -r 000000000000 -r 6474c204b198 dom/ipc/nsIRemoteBlob.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/ipc/nsIRemoteBlob.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* 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/. */
+
+#ifndef mozilla_dom_ipc_nsIRemoteBlob_h
+#define mozilla_dom_ipc_nsIRemoteBlob_h
+
+#include "nsISupports.h"
+
+#ifndef NS_NO_VTABLE
+#define NS_NO_VTABLE
+#endif
+
+#define NS_IREMOTEBLOB_IID \
+  {0x74ce3cdd, 0xbfc9, 0x4edb, {0x98, 0x26, 0x50, 0xcf, 0x00, 0x26, 0x58, 0x70}}
+
+class NS_NO_VTABLE nsIRemoteBlob : public nsISupports
+{
+public: 
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IREMOTEBLOB_IID)
+
+  // This will either return a PBlobChild or PBlobParent.
+  virtual void* GetPBlob() = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsIRemoteBlob, NS_IREMOTEBLOB_IID)
+
+#endif // mozilla_dom_ipc_nsIRemoteBlob_h