[pyauto] GetBrowserInfo() should be usable at chromeos login screen

chrome/browser/automation/testing_automation_provider.h

Index: chrome/browser/automation/testing_automation_provider.h
diff --git a/chrome/browser/automation/testing_automation_provider.h b/chrome/browser/automation/testing_automation_provider.h
index 80ed6f47220dd6e026fc6ae938f08315ddd3b133..06a2b1a3557d56dee7fe6e89bd4acf40ebfd536a 100644
--- a/chrome/browser/automation/testing_automation_provider.h
+++ b/chrome/browser/automation/testing_automation_provider.h
@@ -386,8 +386,7 @@ class TestingAutomationProvider : public AutomationProvider,
   // Get info about the chromium/chrome in use.
   // This includes things like version, executable name, executable path.
   // Uses the JSON interface for input/output.
-  void GetBrowserInfo(Browser* browser,
-                      base::DictionaryValue* args,
+  void GetBrowserInfo(base::DictionaryValue* args,
                       IPC::Message* reply_message);
 
   // Get info about the state of navigation in a given tab.