First pass at refactoring pyautolib in preparation for removing proxy dependencies.

chrome/test/functional/test_pyauto.py

Index: chrome/test/functional/test_pyauto.py
diff --git a/chrome/test/functional/test_pyauto.py b/chrome/test/functional/test_pyauto.py
index 6742ab96e670c3b6a1220e033b3456a79a41824f..acff46b6721d24ffb23b79eeb11d631d2357ee1b 100755
--- a/chrome/test/functional/test_pyauto.py
+++ b/chrome/test/functional/test_pyauto.py
@@ -42,6 +42,15 @@ class PyAutoTest(pyauto.PyUITest):
         pyauto_errors.JSONInterfaceError,
         lambda: self.FindInPage('some text', windex=1))  # invalid window
 
+  def testJSONInterfaceTimeout(self):
+    """Verify that an exception is raised when the JSON interface times out."""
+    self.ClearEventQueue()
+    self.AddDomEventObserver('foo')
+    self.assertRaises(
+        pyauto_errors.JSONInterfaceError,
+        lambda: self.GetNextEvent(timeout=2000))  # event queue is empty
+
+
 
 if __name__ == '__main__':
   pyauto_functional.Main()