Cleanup more test code.

chrome/test/webdriver/session.cc

Index: chrome/test/webdriver/session.cc
diff --git a/chrome/test/webdriver/session.cc b/chrome/test/webdriver/session.cc
index 6c1b026ed91cf7e390b6ee3eac4cfb9faba0d5bd..00de26c11d6d06f4c5a75e12d916118c96cdbba3 100644
--- a/chrome/test/webdriver/session.cc
+++ b/chrome/test/webdriver/session.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -34,6 +34,8 @@ Session::Session(const std::string& id)
       current_frame_xpath_("") {
 }
 
+Session::~Session() {}
+
 bool Session::Init() {
   if (!thread_.Start()) {
     LOG(ERROR) << "Cannot start session thread";