Got tests running in PhantomJS by adding shim for it

gulpfile.js

@@ -38,6 +38,7 @@ var paths = {
     config: "tests/karma.conf.js",
     files: [
       "bower_components/firebase/firebase.js",
+      "tests/phantomjs-es5-shim.js",
       "bower_components/react/react-with-addons.js",
       "bower_components/react/JSXTransformer.js",
       "src/*.js",

package.json

@@ -25,7 +25,6 @@
     "karma": "^0.12.16",
     "karma-jasmine": "~0.2.0",
     "karma-coverage": "^0.2.4",
-    "karma-chrome-launcher": "^0.1.4",
     "karma-phantomjs-launcher": "~0.1.4",
     "gulp": "^3.5.6",
     "gulp-karma": "0.0.4",

tests/karma.conf.js

@@ -9,6 +9,6 @@ module.exports = function(config) {
     coverageReporter: {
       type: "html"
     },
-    browsers: ["Chrome"]
+    browsers: ["PhantomJS"]
   });
 };