diff -r 000000000000 -r 6474c204b198 dom/webidl/Console.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Console.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,93 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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/. */
+
+[ChromeOnly]
+interface Console {
+  void log(any... data);
+  void info(any... data);
+  void warn(any... data);
+  void error(any... data);
+  void _exception(any... data);
+  void debug(any... data);
+  void trace();
+  void dir(any... data);
+  void group(any... data);
+  void groupCollapsed(any... data);
+  void groupEnd(any... data);
+  void time(optional any time);
+  void timeEnd(optional any time);
+
+  void profile(any... data);
+  void profileEnd(any... data);
+
+  void assert(boolean condition, any... data);
+  void count(any... data);
+
+  void ___noSuchMethod__();
+};
+
+// This is used to propagate console events to the observers.
+dictionary ConsoleEvent {
+  (unsigned long or DOMString) ID;
+  (unsigned long or DOMString) innerID;
+  DOMString level = "";
+  DOMString filename = "";
+  unsigned long lineNumber = 0;
+  DOMString functionName = "";
+  double timeStamp = 0;
+  sequence<any> arguments;
+
+  // This array will only hold strings or null elements.
+  sequence<any> styles;
+
+  boolean private = false;
+  // stacktrace is handled via a getter in some cases so we can construct it
+  // lazily.  Note that we're not making this whole thing an interface because
+  // consumers expect to see own properties on it, which would mean making the
+  // props unforgeable, which means lots of JSFunction allocations.  Maybe we
+  // should fix those consumers, of course....
+  // sequence<ConsoleStackEntry> stacktrace;
+  DOMString groupName = "";
+  any timer = null;
+  any counter = null;
+};
+
+// Event for profile operations
+dictionary ConsoleProfileEvent {
+  DOMString action = "";
+  sequence<any> arguments;
+};
+
+// This dictionary is used to manage stack trace data.
+dictionary ConsoleStackEntry {
+  DOMString filename = "";
+  unsigned long lineNumber = 0;
+  DOMString functionName = "";
+  unsigned long language = 0;
+};
+
+dictionary ConsoleTimerStart {
+  DOMString name = "";
+  double started = 0;
+};
+
+dictionary ConsoleTimerEnd {
+  DOMString name = "";
+  double duration = 0;
+};
+
+dictionary ConsoleTimerError {
+  DOMString error = "maxTimersExceeded";
+};
+
+dictionary ConsoleCounter {
+  DOMString label = "";
+  unsigned long count = 0;
+};
+
+dictionary ConsoleCounterError {
+  DOMString error = "maxCountersExceeded";
+};