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

chrome/browser/chromeos/login/user.cc

Index: chrome/browser/chromeos/login/user.cc
diff --git a/chrome/browser/chromeos/login/user.cc b/chrome/browser/chromeos/login/user.cc
index acdaa04b4a6c5bdf6c0f44e6e0d1f42e91564f4f..524ecfaa54a156e37f516f3d40bb22067fc4838c 100644
--- a/chrome/browser/chromeos/login/user.cc
+++ b/chrome/browser/chromeos/login/user.cc
@@ -111,6 +111,17 @@ class PublicAccountUser : public User {
   DISALLOW_COPY_AND_ASSIGN(PublicAccountUser);
 };
 
+UserCredentials::UserCredentials() {
+}
+
+UserCredentials::UserCredentials(const std::string& username,
+                                 const std::string& password,
+                                 const std::string& auth_code)
+    : username(username),
+      password(password),
+      auth_code(auth_code) {
+}
+
 string16 User::GetDisplayName() const {
   // Fallback to the email account name in case display name haven't been set.
   return display_name_.empty() ?