NoSuchSessionException should extend WebDriverException, not NotFoundException

Author: lukeis

java/client/src/org/openqa/selenium/NoSuchSessionException.java

@@ -20,7 +20,7 @@
 /**
  * Thrown by any command being called after {@link WebDriver#quit() WebDriver.quit()}.
  */
-public class NoSuchSessionException extends NotFoundException {
+public class NoSuchSessionException extends WebDriverException {
 
   public NoSuchSessionException() {
   }