Support for auth code based authentication flow for both app and web UI driven flow.

chrome/browser/chromeos/login/webui_screen_locker.h

Index: chrome/browser/chromeos/login/webui_screen_locker.h
diff --git a/chrome/browser/chromeos/login/webui_screen_locker.h b/chrome/browser/chromeos/login/webui_screen_locker.h
index 4c9ed8974344812547b4e9e73320eceddff38829..a1c019eb18a0ca77ead5d210bf936d5badc7c816 100644
--- a/chrome/browser/chromeos/login/webui_screen_locker.h
+++ b/chrome/browser/chromeos/login/webui_screen_locker.h
@@ -30,6 +30,7 @@ namespace chromeos {
 
 class ScreenLocker;
 class WebUILoginDisplay;
+struct UserCredentials;
 
 namespace test {
 class WebUIScreenLockerTester;
@@ -66,11 +67,9 @@ class WebUIScreenLocker : public WebUILoginView,
   virtual void CreateLocallyManagedUser(const string16& display_name,
                                         const std::string& password) OVERRIDE;
 
-  virtual void CompleteLogin(const std::string& username,
-                             const std::string& password) OVERRIDE;
+  virtual void CompleteLogin(const UserCredentials& credentials) OVERRIDE;
   virtual string16 GetConnectedNetworkName() OVERRIDE;
-  virtual void Login(const std::string& username,
-                     const std::string& password) OVERRIDE;
+  virtual void Login(const UserCredentials& credentials) OVERRIDE;
   virtual void LoginAsRetailModeUser() OVERRIDE;
   virtual void LoginAsGuest() OVERRIDE;
   virtual void MigrateUserData(const std::string& old_password) OVERRIDE;