[chromedriver] Remove dll build target.

chrome/test/chromedriver/chromedriver.h

-// Copyright (c) 2012 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_CHROMEDRIVER_CHROMEDRIVER_H_
-#define CHROME_TEST_CHROMEDRIVER_CHROMEDRIVER_H_
-
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-
-class CommandExecutor;
-
-// Inits the command executor. Must be called before |ExecuteCommand|.
-// This may be called during DLL load on Windows.
-void Init(scoped_ptr<CommandExecutor> executor);
-
-// Synchronously executes the given command. Thread safe.
-// Command must be a JSON object:
-// {
-//   "name": <string>,
-//   "parameters": <dictionary>,
-//   "sessionId": <string>
-// }
-// Response will always be a JSON object:
-// {
-//   "status": <integer>,
-//   "value": <object>,
-//   "sessionId": <string>
-// }
-// If "status" is non-zero, "value" will be an object with a string "message"
-// property which signifies the error message.
-void ExecuteCommand(const std::string& command, std::string* response);
-
-// Shuts down the command executor. No commands must be currently executing.
-void Shutdown();
-
-#endif  // CHROME_TEST_CHROMEDRIVER_CHROMEDRIVER_H_