fixed browsertests

Author: sokra

test/cases/parsing/issue-551/index.js

@@ -1,19 +1,25 @@
 var window = {};
 
 it("should be able to set the public path", function() {
+	var originalValue = __webpack_public_path__;
+
 	global.xyz = "xyz";
 	__webpack_public_path__ = global.xyz;
 	__webpack_require__.p.should.be.eql("xyz");
+	delete global.xyz;
 
 	window.something = "something";
 	__webpack_public_path__ = window.something;
 	__webpack_require__.p.should.be.eql("something");
+	delete window.something;
 
 	__webpack_public_path__ = "abc";
 	__webpack_require__.p.should.be.eql("abc");
 
 	__webpack_public_path__ = func();
 	__webpack_require__.p.should.be.eql("func");
+	
+	__webpack_public_path__ = originalValue;
 
 	function func() {
 		return "func";