Two sets of Autofill tests....

chrome/test/pyautolib/pyauto.py

Index: chrome/test/pyautolib/pyauto.py
===================================================================
--- chrome/test/pyautolib/pyauto.py	(revision 78898)
+++ chrome/test/pyautolib/pyauto.py	(working copy)
@@ -754,6 +754,33 @@
     }
     self._GetResultFromJSONRequest(cmd_dict)
 
+  def SendWebkitKeyEvent(self, key_code, tab_index=0, windex=0):

[dennis_jeffrey, 2011/03/22 23:28:53]

For consistency in naming variables, I recommend that you change "tab_index" and
"windex" to either:

(1) "tab_index" and "window_index"
or
(2) "tindex" and "windex"
or
(3) "t_index" and "w_index"

[dyu1, 2011/03/24 19:46:51]

From the pydocs for pyauto most of the variables for this is set to tab_index
and windex. 
http://circus:9999/pyauto.html#PyUITest-InstallExtension

[dennis_jeffrey, 2011/03/25 16:56:14]

Maybe we should change them all then >:-).

Just kidding, you don't have to do that here :-)

+    """Send a webkit key event to the browser.
+
+    Used to simulate key presses from the keyboard to interact with the browser.
+
+    Args:
+      key_code: the hex value associated with the keypress (virtual key code).
+      windex: window index to work on. Defaults to 0 (first window)
+      tab_index: tab index to work on. Defaults to 0 (first tab)

[dennis_jeffrey, 2011/03/22 23:28:53]

Swap the descriptions for the "windex" and "tab_index" parameters to match the
order they appear in the parameter list at line 757 above.

[dyu1, 2011/03/24 19:46:51]

Done.

+    """
+    cmd_dict = {
+      'command': 'SendWebkitKeyEvent',
+      'type': 0,  # kRawKeyDownType
+      'text': '',
+      'isSystemKey': False,
+      'unmodifiedText': '',
+      'nativeKeyCode': 0,
+      'windowsKeyCode': key_code,
+      'modifiers': 0,
+      'windex': windex,
+      'tab_index': tab_index,
+    }
+    # Sending two requests, one each for "key down" and "key up".
+    self._GetResultFromJSONRequest(cmd_dict)
+    cmd_dict['type'] = 3  # kKeyUpType
+    self._GetResultFromJSONRequest(cmd_dict)
+
   def WaitForAllDownloadsToComplete(self, windex=0):
     """Wait for all downloads to complete.