Cleanup: Remove unneeded forward declarations from various chrome subdirectories.

chrome/test/webdriver/webdriver_session.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_WEBDRIVER_SESSION_H_
 #define CHROME_TEST_WEBDRIVER_WEBDRIVER_SESSION_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "base/threading/thread.h"
 #include "chrome/common/automation_constants.h"
 #include "chrome/test/webdriver/frame_path.h"
 #include "chrome/test/webdriver/webdriver_automation.h"
 #include "chrome/test/webdriver/webdriver_basic_types.h"
 #include "chrome/test/webdriver/webdriver_element_id.h"
 
-class CommandLine;
 class FilePath;
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 class Value;
 class WaitableEvent;
 }
 
 namespace webdriver {
@@ skipping 373 matching lines @@
   Options options_;
 
   DISALLOW_COPY_AND_ASSIGN(Session);
 };
 
 }  // namespace webdriver
 
 DISABLE_RUNNABLE_METHOD_REFCOUNT(webdriver::Session);
 
 #endif  // CHROME_TEST_WEBDRIVER_WEBDRIVER_SESSION_H_