Canonicalize user ID passed via chromeos::switches::kLoginUser

chrome/browser/chromeos/login/helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file contains helper functions used by Chromium OS login.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_
 
+#include <string>
+
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/view.h"
 
 class GURL;
 
 namespace gfx {
 class Rect;
 class Size;
@@ skipping 10 matching lines @@
 int GetCurrentUserImageSize();
 
 // Define the constants in |login| namespace to avoid potential
 // conflict with other chromeos components.
 namespace login {
 
 // Maximum size of user image, in which it should be saved to be properly
 // displayed under all possible DPI values.
 const int kMaxUserImageSize = 512;
 
+// Canonicalizes a GAIA user ID, accounting for the legacy guest mode user ID
+// which does trips up gaia::CanonicalizeEmail() because it does not contain an
+// @ symbol.
+std::string CanonicalizeUserID(const std::string& user_id);
+
 // A helper class for easily mocking out Network*Handler calls for tests.
 class NetworkStateHelper {
  public:
   NetworkStateHelper();
   virtual ~NetworkStateHelper();
 
   // Returns name of the currently connected network.
   // If there are no connected networks, returns name of the network
   // that is in the "connecting" state. Otherwise empty string is returned.
   // If there are multiple connected networks, network priority:
   // Ethernet > WiFi > Cellular. Same for connecting network.
   virtual base::string16 GetCurrentNetworkName() const;
 
   // Returns true if the default network is in connected state.
   virtual bool IsConnected() const;
 
   // Returns true if the default network is in connecting state.
   virtual bool IsConnecting() const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NetworkStateHelper);
 };
 
 }  // namespace login
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_HELPER_H_