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

chrome/test/pyautolib/pyautolib.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.
 //
 // This file declares the C++ side of PyAuto, the python interface to
 // Chromium automation.  It access Chromium's internals using Automation Proxy.
 
 #ifndef CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 #define CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_
 #pragma once
@@ skipping 112 matching lines @@
 
   // Open a new browser window. Returns false on failure.
   bool OpenNewBrowserWindow(bool show);
 
   // Close a browser window. Returns false on failure.
   bool CloseBrowserWindow(int window_index);
 
   // Fetch the number of browser windows. Includes popups.
   int GetBrowserWindowCount();
 
-  // Installs the extension.  Returns the extension ID only if the extension
-  // was installed and loaded successfully.  Otherwise, returns the empty
-  // string.  Overinstalls will fail.
-  std::string InstallExtension(const std::string& extension_path, bool with_ui);
-
   // Returns bookmark bar visibility state.
   bool GetBookmarkBarVisibility();
 
   // Returns true if the bookmark bar is visible in the detached state.
   bool IsBookmarkBarDetached();
 
   // Returns bookmark bar animation state.  Warning: timing issues may
   // change this return value unexpectedly.
   bool IsBookmarkBarAnimating();
 
@@ skipping 64 matching lines @@
   // This is necessary since python's unittest module creates instances of
   // TestCase at load time itself.
   static MessageLoop* GetSharedMessageLoop(MessageLoop::Type msg_loop_type);
   static MessageLoop* message_loop_;
 
   // Path to named channel id.
   std::string named_channel_id_;
 };
 
 #endif  // CHROME_TEST_PYAUTOLIB_PYAUTOLIB_H_