Merge pull request #4146 from rafde/lodash5-compat

`_.bind` to `Function.prototype.bind`

Author: jashkenas

backbone.js

@@ -273,15 +273,15 @@
   // once for each event, not once for a combination of all events.
   Events.once = function(name, callback, context) {
     // Map the event into a `{event: once}` object.
-    var events = eventsApi(onceMap, {}, name, callback, _.bind(this.off, this));
+    var events = eventsApi(onceMap, {}, name, callback, this.off.bind(this));
     if (typeof name === 'string' && context == null) callback = void 0;
     return this.on(events, callback, context);
   };
 
   // Inversion-of-control versions of `once`.
   Events.listenToOnce = function(obj, name, callback) {
     // Map the event into a `{event: once}` object.
-    var events = eventsApi(onceMap, {}, name, callback, _.bind(this.stopListening, this, obj));
+    var events = eventsApi(onceMap, {}, name, callback, this.stopListening.bind(this, obj));
     return this.listenTo(obj, events);
   };
 
@@ -1030,7 +1030,7 @@
       options || (options = {});
 
       var length = comparator.length;
-      if (_.isFunction(comparator)) comparator = _.bind(comparator, this);
+      if (_.isFunction(comparator)) comparator = comparator.bind(this);
 
       // Run sort based on type of `comparator`.
       if (length === 1 || _.isString(comparator)) {
@@ -1389,7 +1389,7 @@
         if (!_.isFunction(method)) method = this[method];
         if (!method) continue;
         var match = key.match(delegateEventSplitter);
-        this.delegate(match[1], match[2], _.bind(method, this));
+        this.delegate(match[1], match[2], method.bind(this));
       }
       return this;
     },
@@ -1744,7 +1744,7 @@
   // falls back to polling.
   var History = Backbone.History = function() {
     this.handlers = [];
-    this.checkUrl = _.bind(this.checkUrl, this);
+    this.checkUrl = this.checkUrl.bind(this);
 
     // Ensure that `History` can be used outside of the browser.
     if (typeof window !== 'undefined') {