Add GetURL() and WaitForJSExpression() functions

tools/chrome_proxy/webdriver/simple_smoke.py

Index: tools/chrome_proxy/webdriver/simple_smoke.py
diff --git a/tools/chrome_proxy/webdriver/simple_smoke.py b/tools/chrome_proxy/webdriver/simple_smoke.py
index eacb8e5abd8743db9e0626551f0a775648b67ef2..27766c4b73948856442fb1b27095dfa13fa6864c 100644
--- a/tools/chrome_proxy/webdriver/simple_smoke.py
+++ b/tools/chrome_proxy/webdriver/simple_smoke.py
@@ -16,11 +16,9 @@ class SimpleSmoke(unittest.TestCase):
   def testCheckPageWithProxy(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
-      t.SetURL('http://check.googlezip.net/test.html')
-      t.LoadPage()
+      t.LoadURL('http://check.googlezip.net/test.html')
       print 'Document Title: ', t.ExecuteJavascriptStatement('document.title',
         timeout=1)
-      time.sleep(5)
       responses = t.GetHTTPResponses()
       for response in responses:
         print "URL: %s, ViaHeader: %s, XHR: %s" % (response.url,
@@ -30,11 +28,18 @@ class SimpleSmoke(unittest.TestCase):
   def testPingbackHistogram(self):
     with TestDriver() as t:
       t.AddChromeArg('--enable-spdy-proxy-auth')
-      t.SetURL('http://check.googlezip.net/test.html')
-      t.LoadPage()
-      t.LoadPage()
+      t.LoadURL('http://check.googlezip.net/test.html')
+      t.LoadURL('http://check.googlezip.net/test.html')
       print t.GetHistogram('DataReductionProxy.Pingback.Attempted')
 
+  # Show how to use WaitForJavascriptExpression
+  def testHTML5(self):
+    with TestDriver() as t:
+      t.AddChromeArg('--enable-spdy-proxy-auth')
+      t.LoadURL('http://html5test.com/')
+      t.WaitForJavascriptExpression(
+        'document.getElementsByClassName("pointsPanel")', 15)
+
 if __name__ == '__main__':
   # The unittest library uses sys.argv itself and is easily confused by our
   # command line options. Pass it a simpler argv instead.