[chromedriver] Load the automation extension as a component extension.

chrome/test/chromedriver/client/chromedriver.py

Index: chrome/test/chromedriver/client/chromedriver.py
diff --git a/chrome/test/chromedriver/client/chromedriver.py b/chrome/test/chromedriver/client/chromedriver.py
index ae2ecd8848a79bb3df3fb6c91a192b2b0cb02087..3d7380b76c34743e6c65a2906bf4d876043e181c 100644
--- a/chrome/test/chromedriver/client/chromedriver.py
+++ b/chrome/test/chromedriver/client/chromedriver.py
@@ -62,7 +62,7 @@ class ChromeDriver(object):
 
   def __init__(self, server_url, chrome_binary=None, android_package=None,
                chrome_switches=None, chrome_extensions=None,
-               chrome_log_path=None, chrome_existing_browser=None):
+               chrome_log_path=None, debugger_address=None):
     self._executor = command_executor.CommandExecutor(server_url)
 
     options = {}
@@ -83,9 +83,9 @@ class ChromeDriver(object):
       assert type(chrome_log_path) is str
       options['logPath'] = chrome_log_path
 
-    if chrome_existing_browser:
-      assert type(chrome_existing_browser) is str
-      options['useExistingBrowser'] = chrome_existing_browser
+    if debugger_address:
+      assert type(debugger_address) is str
+      options['debuggerAddress'] = debugger_address
 
     params = {
       'desiredCapabilities': {