title: getting error when run the `protractor` using chrome
body: <p>I ma trying to run the <code>protractor</code> using <code>chrome</code> but i am getting error as  :</p>
  
  <pre><code>protractor config.js
  [15:54:58] I/launcher - Running 1 instances of WebDriver
  [15:54:59] I/local - Starting selenium standalone server...
  [15:55:01] I/local - Selenium standalone server started at http://172.18.32.112:51073/wd/hub
  [15:56:06] E/launcher - chrome not reachable
    (Driver info: chromedriver=2.30.477700 (0057494ad8732195794a7b32078424f92a5fce41),platform=Windows NT 10.0.10240 x86_64) (WARNING: The server did not provide any stacktrace information)
  Command duration or timeout: 60.51 seconds
  Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
  System info: host: 'INCHCMLP01756', ip: '172.18.32.112', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_66'
  Driver info: driver.version: ChromeDriver
  </code></pre>
  
  <p>how to fix this?
  here is my config file :</p>
  
  <pre><code>exports.config = {
      framework : "jasmine",
      capabilities : {
          browserName : "chrome"
      },
      specs : ["spec.js"]
  }
  </code></pre>
  
  <p>Thanks in advance.</p>