refactor(perf): use webdriver to execute benchmarks

- use performance log of chromedriver / appium to get timeline data
  for calculating metrics for benchmarks
- change all benchmarks to be made of a standalone application
  and a protractor test that collectes timeline data
- fix and simplify benchmarks
- add dart2js to build
- remove benchpress

Closes #330

modules/benchmarks/test/perf/di_perf.js

@@ -0,0 +1,42 @@
+"use strict";
+var util = require('../../../../tools/perf/util.js');
+
+describe('ng2 di benchmark', function () {
+
+  var URL = 'benchmarks/web/di/di_benchmark.html';
+
+  afterEach(util.verifyNoErrors);
+
+  it('should log the stats for getByToken', function() {
+    util.runSimpleBenchmark({
+      url: URL,
+      buttons: ['#getByToken'],
+      name: browser.params.lang+'.ng2.di.getByToken'
+    });
+  });
+
+  it('should log the stats for getByKey', function() {
+    util.runSimpleBenchmark({
+      url: URL,
+      buttons: ['#getByKey'],
+      name: browser.params.lang+'.ng2.di.getByKey'
+    });
+  });
+
+  it('should log the stats for getChild', function() {
+    util.runSimpleBenchmark({
+      url: URL,
+      buttons: ['#getChild'],
+      name: browser.params.lang+'.ng2.di.getChild'
+    });
+  });
+
+  it('should log the stats for instantiate', function() {
+    util.runSimpleBenchmark({
+      url: URL,
+      buttons: ['#instantiate'],
+      name: browser.params.lang+'.ng2.di.instantiate'
+    });
+  });
+
+});