user_manager component: Add UserManagerBase class.

chrome/browser/chromeos/login/users/mock_user_manager.h

Index: chrome/browser/chromeos/login/users/mock_user_manager.h
diff --git a/chrome/browser/chromeos/login/users/mock_user_manager.h b/chrome/browser/chromeos/login/users/mock_user_manager.h
index 26aa3e6014c1ce9cdf4583ce06afe3ef2ffe752c..fb72cabe5f1b2027c0d2d20802233a509a1b1abc 100644
--- a/chrome/browser/chromeos/login/users/mock_user_manager.h
+++ b/chrome/browser/chromeos/login/users/mock_user_manager.h
@@ -78,11 +78,11 @@ class MockUserManager : public UserManager {
   MOCK_CONST_METHOD0(AreSupervisedUsersAllowed, bool(void));
 
   // You can't mock these functions easily because nobody can create
-  // User objects but the UserManagerImpl and us.
+  // User objects but the ChromeUserManager and us.
   virtual const user_manager::UserList& GetUsers() const OVERRIDE;
   virtual const user_manager::User* GetLoggedInUser() const OVERRIDE;
   virtual user_manager::UserList GetUnlockUsers() const OVERRIDE;
-  virtual const std::string& GetOwnerEmail() OVERRIDE;
+  virtual const std::string& GetOwnerEmail() const OVERRIDE;
   virtual user_manager::User* GetLoggedInUser() OVERRIDE;

[Dmitry Polukhin, 2014/07/28 09:32:39]

Why it is no const?

[Nikita (slow), 2014/07/29 09:27:28]

Replied in another comment.

   virtual const user_manager::User* GetActiveUser() const OVERRIDE;
   virtual user_manager::User* GetActiveUser() OVERRIDE;

[Dmitry Polukhin, 2014/07/28 09:32:39]

Ditto.

[Nikita (slow), 2014/07/29 09:27:27]

Replied in another comment.