Allow chromedriver to install an extension and get all installed extension IDs.

chrome/test/automation/automation_json_requests.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_AUTOMATION_AUTOMATION_JSON_REQUESTS_H_
 #define CHROME_TEST_AUTOMATION_AUTOMATION_JSON_REQUESTS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 299 matching lines @@
     AutomationMessageSender* sender,
     std::string* error_msg) WARN_UNUSED_RESULT;
 
 // Requests the version of ChromeDriver automation supported by the automation
 // server. Returns true on success.
 bool SendGetChromeDriverAutomationVersion(
     AutomationMessageSender* sender,
     int* version,
     std::string* error_msg) WARN_UNUSED_RESULT;
 
+// Requests info about all installed extensions. Returns true on success.
+bool SendGetExtensionsInfoJSONRequest(
+    AutomationMessageSender* sender,
+    base::ListValue* extensions_list,
+    std::string* error_msg) WARN_UNUSED_RESULT;
+
+// Requests that the given extension be installed. Returns true on success.
+bool SendInstallExtensionJSONRequest(
+    AutomationMessageSender* sender,
+    const FilePath& path,
+    std::string* extension_id,
+    std::string* error_msg) WARN_UNUSED_RESULT;
+
 #endif  // CHROME_TEST_AUTOMATION_AUTOMATION_JSON_REQUESTS_H_