ChromeOS: This CL moves chromeos/login/user_names* to user_mananger.

components/user_manager/user.h

Index: components/user_manager/user.h
diff --git a/components/user_manager/user.h b/components/user_manager/user.h
index 5435f1ed23f93f342ab55cdb31753af000ccf826..9ace71923a8bd4037c52858a73823ac9c15a2ba1 100644
--- a/components/user_manager/user.h
+++ b/components/user_manager/user.h
@@ -180,16 +180,16 @@ class USER_MANAGER_EXPORT User : public UserInfo {
 
  protected:
   friend class UserManagerBase;
-  friend class chromeos::ChromeUserManagerImpl;
-  friend class chromeos::SupervisedUserManagerImpl;
-  friend class chromeos::UserImageManagerImpl;
-  friend class chromeos::UserSessionManager;
+  friend class ::chromeos::ChromeUserManagerImpl;
+  friend class ::chromeos::SupervisedUserManagerImpl;
+  friend class ::chromeos::UserImageManagerImpl;
+  friend class ::chromeos::UserSessionManager;
 
   // For testing:
   friend class FakeUserManager;
-  friend class chromeos::FakeChromeUserManager;
-  friend class chromeos::MockUserManager;
-  friend class chromeos::UserAddingScreenTest;
+  friend class ::chromeos::FakeChromeUserManager;
+  friend class ::chromeos::MockUserManager;
+  friend class ::chromeos::UserAddingScreenTest;
   FRIEND_TEST_ALL_PREFIXES(UserTest, DeviceLocalAccountAffiliation);
 
   // Do not allow anyone else to create new User instances.