Fix minor issues in ChromeDriver.

chrome/test/webdriver/session_manager.h

 // 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.
 
 #ifndef CHROME_TEST_WEBDRIVER_SESSION_MANAGER_H_
 #define CHROME_TEST_WEBDRIVER_SESSION_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 20 matching lines @@
   bool Remove(const std::string& id);
   bool Has(const std::string& id) const;
 
   Session* GetSession(const std::string& id) const;
 
   void set_port(const std::string& port);
 
   void set_url_base(const std::string& url_base);
   std::string url_base() const;
 
-  void set_chrome_dir(const FilePath& chrome_dir);
-  FilePath chrome_dir() const;
-
  private:
   SessionManager();
   ~SessionManager();
   friend struct DefaultSingletonTraits<SessionManager>;
 
   std::map<std::string, Session*> map_;
   mutable base::Lock map_lock_;
   std::string port_;
   std::string url_base_;
-  FilePath chrome_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionManager);
 };
 
 }  // namespace webdriver
 
 #endif  // CHROME_TEST_WEBDRIVER_SESSION_MANAGER_H_