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

chrome/test/functional/process_count.py

 #!/usr/bin/python
 # 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.
 
 import os
 
 import pyauto_functional
 import pyauto
 
@@ skipping 77 matching lines @@
   def testProcessCountFlashProcess(self):
     """Verifies the process count when the flash process is running."""
     flash_url = self.GetFileURLForDataPath('plugin', 'flash.swf')
     self.NavigateToURL(flash_url)
     self._VerifyProcessCount(self.proc_count_fresh_profile + 1)
 
   def testProcessCountExtensionProcess(self):
     """Verifies the process count when an extension is installed."""
     crx_file_path = os.path.abspath(
         os.path.join(self.DataDir(), 'extensions', 'page_action.crx'))
-    self.assertTrue(self.InstallExtension(crx_file_path, False),
-                    msg='Extension install failed.')
+    self.InstallExtension(crx_file_path)
     self._VerifyProcessCount(self.proc_count_fresh_profile + 1)
 
   def testProcessCountCombination(self):
     """Verifies process count with a combination of tabs/windows/extensions.
 
     This test installs 1 extension, appends 2 tabs to the window, navigates 1
     tab to a flash page, opens 1 new window, and appends 3 tabs to the new
     window (8 new processes expected).
     """
     if self.IsMac():
       # On Mac 10.5, flash files loaded too quickly after firing browser ends
       # up getting downloaded, which seems to indicate that the plugin hasn't
       # been registered yet.
       # Hack to register Flash plugin on Mac 10.5.  crbug.com/94123
       self.GetPluginsInfo()
     crx_file_path = os.path.abspath(
         os.path.join(self.DataDir(), 'extensions', 'page_action.crx'))
-    self.assertTrue(self.InstallExtension(crx_file_path, False),
-                    msg='Extension install failed.')
+    self.InstallExtension(crx_file_path)
 
     for _ in xrange(2):
       self.AppendTab(pyauto.GURL('about:blank'), 0)
 
     flash_url = self.GetFileURLForDataPath('plugin', 'flash.swf')
     self.NavigateToURL(flash_url)
 
     self.OpenNewBrowserWindow(True)
 
     for _ in xrange(3):
       self.AppendTab(pyauto.GURL('about:blank'), 1)
 
     self._VerifyProcessCount(self.proc_count_fresh_profile + 8)
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()