Let pyauto create an attached webdriver instance to manipulate web pages.

chrome/browser/automation/testing_automation_provider.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_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_
 #define CHROME_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 1132 matching lines @@
   //   input: none
   //   output: { "version": 1 }
   void GetChromeDriverAutomationVersion(base::DictionaryValue* args,
                                         IPC::Message* message);
 
   // Auto-updates installed extensions.
   // Uses the JSON interface for input/output.
   void UpdateExtensionsNow(base::DictionaryValue* args,
                            IPC::Message* reply_message);
 
+  // Creates a new |TestingAutomationProvider| that opens a server channel
+  // for the given |channel_id|.
+  // Example:
+  //   input: { "channel_id": "testChannel123" }
+  //   output: none
+  void CreateNewAutomationProvider(base::DictionaryValue* args,
+                                   IPC::Message* reply_message);
+
 #if defined(OS_CHROMEOS)
   void GetLoginInfo(base::DictionaryValue* args, IPC::Message* reply_message);
 
   void ShowCreateAccountUI(base::DictionaryValue* args,
                            IPC::Message* reply_message);
 
   void LoginAsGuest(base::DictionaryValue* args, IPC::Message* reply_message);
 
   void Login(base::DictionaryValue* args, IPC::Message* reply_message);
 
@@ skipping 129 matching lines @@
   // Used to enumerate browser profiles.
   scoped_refptr<ImporterList> importer_list_;
 
   // The stored data for the ImportSettings operation.
   ImportSettingsData import_settings_data_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingAutomationProvider);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_TESTING_AUTOMATION_PROVIDER_H_