Fix to enable the cached credentials login test

chrome/browser/automation/testing_automation_provider_chromeos.cc

Index: chrome/browser/automation/testing_automation_provider_chromeos.cc
diff --git a/chrome/browser/automation/testing_automation_provider_chromeos.cc b/chrome/browser/automation/testing_automation_provider_chromeos.cc
index f256a037360051355401675ca0fa3ae6a424255b..8390f39881e387f10e999aa1461da2b876335707 100644
--- a/chrome/browser/automation/testing_automation_provider_chromeos.cc
+++ b/chrome/browser/automation/testing_automation_provider_chromeos.cc
@@ -356,6 +356,33 @@ void TestingAutomationProvider::LoginAsGuest(DictionaryValue* args,
   controller->LoginAsGuest();
 }
 
+void TestingAutomationProvider::LoginWithCachedCredentials(
+    DictionaryValue* args,
+    IPC::Message* reply_message) {
+  AutomationJSONReply reply(this, reply_message);
+
+  std::string username, password;
+  if (!args->GetString("username", &username) ||
+      !args->GetString("password", &password)) {
+    reply.SendError("Invalid or missing args.");
+    return;
+  }
+
+  chromeos::ExistingUserController* controller =
+      chromeos::ExistingUserController::current_controller();
+  if (!controller) {
+    reply.SendError("Unable to access ExistingUserController");
+    return;
+  }
+
+  // WebUI login.
+  chromeos::WebUILoginDisplay* webui_login_display =
+      static_cast<chromeos::WebUILoginDisplay*>(controller->login_display());
+
+  webui_login_display->Login(username, password);

[craigdh, 2012/09/18 18:16:35]

This looks identical to SubmitLoginForm except for this line. I suggest making
them one command that takes a use_cached_credentials boolean option to choose
the login behavior. This would also allow removal of the duplicated (non-trival)
Python code.

[beeps, 2012/09/19 16:29:02]

Done.

+  reply.SendSuccess(NULL);
+}
+
 void TestingAutomationProvider::SubmitLoginForm(DictionaryValue* args,
                                                 IPC::Message* reply_message) {
   AutomationJSONReply reply(this, reply_message);