After locking a profile and showing the User Manager, make Guest the active profile

chrome/browser/profiles/profile_info_cache.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.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 104 matching lines @@
   void SetGAIAGivenNameOfProfileAtIndex(size_t index,
                                         const base::string16& name);
   void SetGAIAPictureOfProfileAtIndex(size_t index, const gfx::Image* image);
   void SetIsUsingGAIAPictureOfProfileAtIndex(size_t index, bool value);
   void SetProfileSigninRequiredAtIndex(size_t index, bool value);
   void SetProfileIsEphemeralAtIndex(size_t index, bool value);
   void SetProfileIsUsingDefaultNameAtIndex(size_t index, bool value);
   void SetProfileIsUsingDefaultAvatarAtIndex(size_t index, bool value);
 
   // Determines whether |name| is one of the default assigned names.
-  bool IsDefaultProfileName(const base::string16& name);
+  bool IsDefaultProfileName(const base::string16& name) const;
 
   // Returns unique name that can be assigned to a newly created profile.
   base::string16 ChooseNameForNewProfile(size_t icon_index) const;
 
   // Returns an avatar icon index that can be assigned to a newly created
   // profile. Note that the icon may not be unique since there are a limited
   // set of default icons.
   size_t ChooseAvatarIconIndexForNewProfile() const;
 
   const base::FilePath& GetUserDataDir() const;
@@ skipping 93 matching lines @@
   // This prevents a picture from being downloaded multiple times. The
   // ProfileAvatarDownloader instances are deleted when the download completes
   // or when the ProfileInfoCache is destroyed.
   mutable std::map<std::string, ProfileAvatarDownloader*>
       avatar_images_downloads_in_progress_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileInfoCache);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_