diff -r 000000000000 -r 6474c204b198 content/base/public/nsIDOMFileReader.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/public/nsIDOMFileReader.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsIDOMEventTarget.idl"
+
+interface nsIDOMEventListener;
+interface nsIDOMBlob;
+
+[scriptable, builtinclass, uuid(39ea2c73-7711-4cea-9f73-3166c24dfa69)]
+interface nsIDOMFileReader : nsIDOMEventTarget
+{
+  [implicit_jscontext]
+  void readAsArrayBuffer(in nsIDOMBlob filedata);
+  void readAsBinaryString(in nsIDOMBlob filedata);
+  void readAsText(in nsIDOMBlob filedata, [optional] in DOMString encoding);
+  void readAsDataURL(in nsIDOMBlob file);
+
+  void abort();
+
+  const unsigned short EMPTY = 0;
+  const unsigned short LOADING = 1;
+  const unsigned short DONE = 2;
+  readonly attribute unsigned short readyState;
+
+  [implicit_jscontext]
+  readonly attribute jsval result;
+
+  // This is a DOMError
+  readonly attribute nsISupports error;
+
+  [implicit_jscontext] attribute jsval onloadstart;
+  [implicit_jscontext] attribute jsval onprogress;
+  [implicit_jscontext] attribute jsval onload;
+  [implicit_jscontext] attribute jsval onabort;
+  [implicit_jscontext] attribute jsval onerror;
+  [implicit_jscontext] attribute jsval onloadend;
+};
+
+%{ C++
+#define NS_FILEREADER_CID                            \
+{0x06aa7c21, 0xfe05, 0x4cf2,                         \
+{0xb1, 0xc4, 0x0c, 0x71, 0x26, 0xa4, 0xf7, 0x13}}
+#define NS_FILEREADER_CONTRACTID \
+"@mozilla.org/files/filereader;1"
+%}