[chromedriver] Implement connecting to devtools and loading a page.

chrome/test/chromedriver/command_executor.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_COMMAND_EXECUTOR_H_
 #define CHROME_TEST_CHROMEDRIVER_COMMAND_EXECUTOR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "chrome/test/chromedriver/status.h"
 
 namespace base {
 class DictionaryValue;
 class Value;
 }
 
 // Executes WebDriver commands.
 class CommandExecutor {
  public:
   virtual ~CommandExecutor() {}
 
+  virtual void Init() = 0;
+
   // Executes a command synchronously. This function must be thread safe.
   virtual void ExecuteCommand(const std::string& name,
                               const base::DictionaryValue& params,
                               const std::string& session_id,
                               StatusCode* status_code,
                               scoped_ptr<base::Value>* value,
                               std::string* out_session_id) = 0;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_COMMAND_EXECUTOR_H_