diff -r 000000000000 -r 6474c204b198 b2g/components/ProcessGlobal.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/components/ProcessGlobal.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* 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/. */
+
+'use strict';
+
+/**
+ * This code exists to be a "grab bag" of global code that needs to be
+ * loaded per B2G process, but doesn't need to directly interact with
+ * web content.
+ *
+ * (It's written as an XPCOM service because it needs to watch
+ * app-startup.)
+ */
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import('resource://gre/modules/Services.jsm');
+Cu.import('resource://gre/modules/XPCOMUtils.jsm');
+
+// Preloading the CSP jsm in this process early on.
+Cu.import("resource://gre/modules/CSPUtils.jsm");
+
+function debug(msg) {
+  log(msg);
+}
+function log(msg) {
+  // This file implements console.log(), so use dump().
+  //dump('ProcessGlobal: ' + msg + '\n');
+}
+
+function ProcessGlobal() {}
+ProcessGlobal.prototype = {
+  classID: Components.ID('{1a94c87a-5ece-4d11-91e1-d29c29f21b28}'),
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference]),
+
+  observe: function pg_observe(subject, topic, data) {
+    switch (topic) {
+    case 'app-startup': {
+      Services.obs.addObserver(this, 'console-api-log-event', false);
+      break;
+    }
+    case 'console-api-log-event': {
+      // Pipe `console` log messages to the nsIConsoleService which
+      // writes them to logcat on Gonk.
+      let message = subject.wrappedJSObject;
+      let prefix = ('Content JS ' + message.level.toUpperCase() +
+                    ' at ' + message.filename + ':' + message.lineNumber +
+                    ' in ' + (message.functionName || 'anonymous') + ': ');
+      Services.console.logStringMessage(prefix + Array.join(message.arguments,
+                                                            ' '));
+      break;
+    }
+    }
+  },
+};
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ProcessGlobal]);