Replace window var with root to better grab the global when using custom IIFEs.

Former-commit-id: f79834c6b53d692e85801d6258cd8beb35c776c2

lodash.js

@@ -129,7 +129,7 @@
   };
 
   /** Used as a reference to the global object */
-  var window = this;
+  var root = (objectTypes[typeof window] && window) || this;
 
   /** Detect free variable `exports` */
   var freeExports = objectTypes[typeof exports] && exports;
@@ -137,10 +137,10 @@
   /** Detect free variable `module` */
   var freeModule = objectTypes[typeof module] && module && module.exports == freeExports && module;
 
-  /** Detect free variable `global` from Node.js or Browserified code and use it as `window` */
+  /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
   var freeGlobal = objectTypes[typeof global] && global;
   if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
-    window = freeGlobal;
+    root = freeGlobal;
   }
 
   /*--------------------------------------------------------------------------*/
@@ -443,7 +443,7 @@
    * @static
    * @memberOf _
    * @category Utilities
-   * @param {Object} [context=window] The context object.
+   * @param {Object} [context=root] The context object.
    * @returns {Function} Returns the `lodash` function.
    */
   function runInContext(context) {
@@ -451,7 +451,7 @@
     // after built-in constructors like `Object`, for the creation of literals.
     // ES5 clears this up by stating that literals must use built-in constructors.
     // See http://es5.github.io/#x11.1.5.
-    context = context ? _.defaults(window.Object(), context, _.pick(window, contextProps)) : window;
+    context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
 
     /** Native constructor references */
     var Array = context.Array,
@@ -6580,7 +6580,7 @@
     // case Lo-Dash was injected by a third-party script and not intended to be
     // loaded as a module. The global assignment can be reverted in the Lo-Dash
     // module via its `noConflict()` method.
-    window._ = _;
+    root._ = _;
 
     // define as an anonymous module so, through path mapping, it can be
     // referenced as the "underscore" module
@@ -6601,6 +6601,6 @@
   }
   else {
     // in a browser or Rhino
-    window._ = _;
+    root._ = _;
   }
 }.call(this));