title: Selenium exits with errors (chromewebdriver)
body: <p>When I run my script (which tests the subscribe feature on my friends website)
  It exits with this error:</p>
  <pre><code>  File &quot;subtest.py&quot;, line 3, in &lt;module&gt;
  driver = webdriver.Chrome('/usr/local/bin/chromedriver')
  File &quot;/usr/local/lib/python2.7/dist-packages/selenium/webdriver/chrome/webdriver.py&quot;, line 62, in __init__
  self.service.start()
  File &quot;/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.py&quot;, line 96, in start
  self.assert_process_still_running()
  File &quot;/usr/local/lib/python2.7/dist-packages/selenium/webdriver/common/service.py&quot;, line 109, in assert_process_still_running
  % (self.path, return_code)
  selenium.common.exceptions.WebDriverException: Message: Service /usr/local/bin/chromedriver unexpectedly exited. Status code was: 127
  </code></pre>
  <p>I should also mention that I am using python2.7</p>