New Added client-side Sentry logging

Using Raven.js allows logging client-side javascript errors to the
configured Sentry server.

htdocs/includes/raven-js/plugins/native.js

@@ -0,0 +1,33 @@
+/**
+ * native plugin
+ *
+ * Extends support for global error handling for asynchronous browser
+ * functions. Adopted from Closure Library's errorhandler.js.
+ */
+;(function extendToAsynchronousCallbacks(window, Raven) {
+"use strict";
+
+var _helper = function _helper(fnName) {
+    var originalFn = window[fnName];
+    window[fnName] = function ravenAsyncExtension() {
+        // Make a copy of the arguments
+        var args = [].slice.call(arguments);
+        var originalCallback = args[0];
+        if (typeof (originalCallback) === 'function') {
+            args[0] = Raven.wrap(originalCallback);
+        }
+        // IE < 9 doesn't support .call/.apply on setInterval/setTimeout, but it
+        // also supports only two arguments and doesn't care what this is, so we
+        // can just call the original function directly.
+        if (originalFn.apply) {
+            return originalFn.apply(this, args);
+        } else {
+            return originalFn(args[0], args[1]);
+        }
+    };
+};
+
+_helper('setTimeout');
+_helper('setInterval');
+
+}(window, window.Raven));